EXHIBIT 4.1 RIGHTS AGREEMENT BETWEEN AMERICAN STOCK TRANSFER & TRUST, INC. AND NPS PHARMACEUTICALS, INC. DATED DECEMBER 4, 1996

EXHIBIT 4.1

RIGHTS AGREEMENT
BETWEEN
AMERICAN STOCK TRANSFER & TRUST, INC.
AND
NPS PHARMACEUTICALS, INC.
DATED
DECEMBER 4, 1996

_______________________________________________________________________________

NPS PHARMACEUTICALS, INC.

AND

AMERICAN SECURITIES TRANSFER & TRUST, INC.
AS RIGHTS AGENT

RIGHTS AGREEMENT

DATED AS OF DECEMBER 4, 1996

_______________________________________________________________________________

TABLE OF CONTENTS

PAGE

Section 1. Certain Definitions. . . . . . . . . . . . . . . . . . . . . . . 1

Section 2. Appointment of Rights Agent. . . . . . . . . . . . . . . . . . . 4

Section 3. Issue of Right Certificates. . . . . . . . . . . . . . . . . . . 5

Section 4. Form of Right Certificates . . . . . . . . . . . . . . . . . . . 6

Section 5. Countersignature and Registration. . . . . . . . . . . . . . . . 7

Section 6. Transfer, Split Up, Combination and Exchange of Right
Certificates; Mutilated, Destroyed, Lost or Stolen Right
Certificates . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Section 7. Exercise of Rights; Purchase Price; Expiration Date of Rights. . 8

Section 8. Cancellation and Destruction of Right Certificates . . . . . . . 10

Section 9. Availability of Preferred Shares . . . . . . . . . . . . . . . . 10

Section 10. Preferred Shares Record Date. . . . . . . . . . . . . . . . . . 11

Section 11. Adjustment of Purchase Price, Number of Shares or Number of
Rights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Section 12. Certificate of Adjusted Purchase Price or Number of Shares. . . 18

Section 13. Consolidation, Merger or Sale or Transfer of Assets or Earning
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Section 14. Fractional Rights and Fractional Shares . . . . . . . . . . . . 21

Section 15. Rights of Action. . . . . . . . . . . . . . . . . . . . . . . . 22

Section 16. Agreement of Right Holders. . . . . . . . . . . . . . . . . . . 23

Section 17. Right Certificate Holder Not Deemed a Stockholder . . . . . . . 23

Section 18. Concerning the Rights Agent . . . . . . . . . . . . . . . . . . 24

Section 19. Merger or Consolidation or Change of Name of Rights Agent . . . 24

Section 20. Duties of Rights Agent. . . . . . . . . . . . . . . . . . . . . 25

TABLE OF CONTENTS
(CONTINUED)

PAGE

Section 21. Change of Rights Agent. . . . . . . . . . . . . . . . . . . . . 27

Section 22. Issuance of New Right Certificates. . . . . . . . . . . . . . . 27

Section 23. Redemption. . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Section 24. Exchange. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Section 25. Notice of Certain Events. . . . . . . . . . . . . . . . . . . . 31

Section 26. Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Section 27. Supplements and Amendments. . . . . . . . . . . . . . . . . . . 32

Section 28. Determination and Actions by the Board of Directors, etc. . . . 33

Section 29. Successors. . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Section 30. Benefits of this Agreement. . . . . . . . . . . . . . . . . . . 33

Section 31. Severability. . . . . . . . . . . . . . . . . . . . . . . . . . 34

Section 32. Governing Law . . . . . . . . . . . . . . . . . . . . . . . . . 34

Section 33. Counterparts. . . . . . . . . . . . . . . . . . . . . . . . . . 34

Section 34. Descriptive Headings. . . . . . . . . . . . . . . . . . . . . . 34

Exhibit A - Form of Certificate of Designation

Exhibit B - Form of Right Certificate

Exhibit C - Summary of Rights to Purchase Preferred Shares

ii.

RIGHTS AGREEMENT

AGREEMENT, dated as of December 4, 1996, between NPS PHARMACEUTICALS, INC., a
Delaware corporation (the "Company"), and AMERICAN SECURITIES TRANSFER & TRUST,
INC. ("Rights Agent").

The Board of Directors of the Company has authorized and declared a dividend
of one preferred share purchase right (a "Right") for each Common Share (as
hereinafter defined) of the Company outstanding at the close of business on
December 31, 1996 (the "Record Date "), each Right representing the right to
purchase one one-hundredth of a Preferred Share (as hereinafter defined), upon
the terms and subject to the conditions herein set forth, and has further
authorized and directed the issuance of one Right with respect to each Common
Share that shall become outstanding between the Record Date and the earliest of
the Distribution Date, the Redemption Date and the Final Expiration Date (as
such terms are hereinafter defined); PROVIDED, HOWEVER, that Rights may be
issued with respect to Common Shares that shall become outstanding after the
Distribution Date and prior to the earlier of the Redemption Date and the Final
Expiration Date in accordance with the provisions of Section 22 of this
Agreement.

Accordingly, in consideration of the premises and the mutual agreements
herein set forth, the parties hereby agree as follows:

SECTION 1. CERTAIN DEFINITIONS. For purposes of this Agreement, the
following terms have the meanings indicated:

(a) "ACQUIRING PERSON" shall mean any Person (as such term is hereinafter
defined) who or which, together with all Affiliates and Associates (as such
terms are hereinafter defined) of such Person, shall be the Beneficial Owner (as
such term is hereinafter defined) of 20% or more of the Common Shares of the
Company then outstanding. Notwithstanding the foregoing, (A) the term Acquiring
Person shall not include (i) the Company, (ii) any Subsidiary (as such term is
hereinafter defined) of the Company, (iii) any employee benefit plan of the
Company or any Subsidiary of the Company, or (iv) or any entity holding Common
Shares for or pursuant to the terms of any such employee benefit plan, and
(B) no Person shall become an "Acquiring Person" either (x) as the result of an
acquisition of Common Shares by the Company which, by reducing the number of
shares outstanding, increases the proportionate number of shares beneficially
owned by such Person to 20% or more of the Common Shares of the Company then
outstanding; PROVIDED, HOWEVER, that if a Person shall become the Beneficial
Owner of 20% or more of the Common Shares of the Company then outstanding by
reason of share purchases by the Company and shall, after such share purchases
by the Company, become the Beneficial Owner of any additional Common Shares of
the Company, then such Person shall be deemed to be an "Acquiring Person" or
(y) if the Incumbent Board (as such term is hereinafter defined) determines in
good faith that a Person who would otherwise be an "Acquiring Person," as
defined pursuant to the foregoing provisions of this paragraph (a), has become
such inadvertently, and such Person divests as promptly as practicable a
sufficient number of Common Shares so that such Person would no longer be an
Acquiring Person, as defined

pursuant to the foregoing provisions of this paragraph (a), then such Person
shall not be deemed to be an "Acquiring Person" for any purposes of this
Agreement.

(b) "AFFILIATE" and "ASSOCIATE" shall have the respective meanings ascribed
to such terms in Rule 12b-2 of the General Rules and Regulations under the
Securities Exchange Act of 1934, as amended (the "Exchange Act"), as in effect
on the date of this Agreement; PROVIDED, HOWEVER, that the limited partners of a
limited partnership shall not be deemed to be Associates of such limited
partnership solely by virtue of their limited partnership interest.

(i) which such Person or any of such Person's Affiliates or Associates
beneficially owns, directly or indirectly;

(ii) which such Person or any of such Person's Affiliates or Associates
has (A) the right to acquire (whether such right is exercisable immediately
or only after the passage of time) pursuant to any agreement, arrangement or
understanding (other than customary agreements with and between underwriters
and selling group members with respect to a bona fide public offering of
securities), or upon the exercise of conversion rights, exchange rights,
rights (other than these Rights), warrants or options, or otherwise;
PROVIDED, HOWEVER, that a Person shall not be deemed the Beneficial Owner of,
or to beneficially own, securities tendered pursuant to a tender or exchange
offer made by or on behalf of such Person or any of such Person's Affiliates
or Associates until such tendered securities are accepted for purchase or
exchange; or (B) the right to vote pursuant to any agreement, arrangement or
understanding; PROVIDED, HOWEVER, that a Person shall not be deemed the
Beneficial Owner of, or to beneficially own, any security if the agreement,
arrangement or understanding to vote such security (1) arises solely from a
revocable proxy or consent given to such Person in response to a public proxy
or consent solicitation made pursuant to, and in accordance with, the
applicable rules and regulations promulgated under the Exchange Act and
(2) is not also then reportable on Schedule 13D under the Exchange Act (or
any comparable or successor report); or

(iii) which are beneficially owned, directly or indirectly, by any
other Person with which such Person or any of such Person's Affiliates or
Associates has any agreement, arrangement or understanding (other than
customary agreements with and between underwriters and selling group members
with respect to a bona fide public offering of securities) for the purpose of
acquiring, holding, voting (except to the extent contemplated by the proviso
to Section 1(c)(ii)(B)) or disposing of any securities of the Company.

Notwithstanding anything in this definition of Beneficial Ownership to the
contrary, the phrase, "then outstanding," when used with reference to a Person's
Beneficial Ownership of securities of the Company, shall mean the number of such
securities then issued and outstanding together

with the number of such securities not then actually issued and outstanding
which such Person would be deemed to own beneficially hereunder.

(d) "BUSINESS DAY" shall mean any day other than a Saturday, a Sunday, or a
day on which banking institutions in the State of Colorado are authorized or
obligated by law or executive order to close.

(e) "CHANGE OF CONTROL" shall mean:

(i) The acquisition (other than from the Company) by any person, entity
or "group," within the meaning of Section 13(d)(3) or 14(d)(2) of the
Exchange Act, (excluding, for this purpose, the Company or its subsidiaries,
or any employee benefit plan of the Company or its subsidiaries which
acquires beneficial ownership of voting securities of the Company) of
beneficial ownership, (within the meaning of Rule 13d-3 promulgated under the
Exchange Act) of 50% or more of either the then outstanding Common Shares or
the combined voting power of the Company's then outstanding voting securities
entitled to vote generally in the election of directors; or

(ii) Individuals who, as of the date hereof, constitute the Board (as of
the date hereof the "Incumbent Board") cease for any reason to constitute at
least a majority of the Board, PROVIDED, HOWEVER, that any person becoming a
director subsequent to the date hereof whose election, or nomination for
election by the Company's stockholders, was approved by a vote of at least a
majority of the directors then comprising the Incumbent Board (other than an
Affiliate or Associate of an Acquiring Person) shall be, for purposes of this
Agreement, considered as though such person were a member of the Incumbent
Board; or

(iii) Approval by the stockholders of the Company of a
reorganization, merger, or consolidation, in each case, with respect to which
persons who were the stockholders of the Company immediately prior to such
reorganization, merger or consolidation do not immediately thereafter, own
more than 50% of the combined voting power entitled to vote generally in the
election of directors of the reorganized, merged or consolidated company's
then outstanding voting securities, or a liquidation or dissolution of the
Company or of the sale of all or substantially all of the assets of the
Company.

(f) "CLOSE OF BUSINESS" on any given date shall mean 5:00 p.m., Mountain
Standard time, on such date; PROVIDED, HOWEVER, that if such date is not a
Business Day it shall mean 5:00 p.m., Mountain Standard time, on the next
succeeding Business Day.

(g) "COMMON SHARES" when used with reference to the Company shall mean the
shares of common stock, par value $.001 per share, of the Company. "Common
Shares" when used with reference to any Person other than the Company shall mean
the capital stock (or equity interest) with the greatest voting power of such
other Person or, if such other Person is a Subsidiary of another Person, the
Person or Persons which ultimately control such first-mentioned Person.

(h) "DISTRIBUTION DATE" shall have the meaning set forth in Section 3
hereof.

(i) "FINAL EXPIRATION DATE" shall have the meaning set forth in Section 7
hereof.

(j) "INTERESTED STOCKHOLDER" shall mean any Acquiring Person or any
Affiliate or Associate of an Acquiring Person or any other Person in which any
such Acquiring Person, Affiliate or Associate has an interest, or any other
Person acting directly or indirectly on behalf of or in concert with any such
Acquiring Person, Affiliate or Associate.

(k) "PERSON" shall mean any individual, firm, corporation or other entity,
and shall include any successor (by merger or otherwise) of such entity.

(l) "PREFERRED SHARES" shall mean shares of Series A Junior Participating
Preferred Stock, par value $.001 per share, of the Company having the
designations and the powers, preferences and rights, and the qualifications,
limitations and restrictions set forth in the Form of Certificate of Designation
attached to this Agreement as Exhibit A.

(m) "REDEMPTION DATE" shall have the meaning set forth in Section 7 hereof.

(n) "SHARES ACQUISITION DATE" shall mean the first date of public
announcement by the Company or an Acquiring Person that an Acquiring Person has
become such PROVIDED, HOWEVER that, if such Person is determined not to have
become an Acquiring Person pursuant to (y) of the last sentence of Section 1(a)
hereof, then no Shares Acquisition Date shall be deemed to have occurred.

(o) "SUBSIDIARY" of any Person shall mean any corporation or other entity of
which a majority of the voting power of the voting equity securities or equity
interest is owned, directly or indirectly, by such Person.

(p) "TRANSACTION" shall mean any merger, consolidation or sale of assets
described in Section 13(a) hereof or any acquisition of shares of Common Stock
of the Company which would result in a Person becoming a Transaction Person.

(q) "TRANSACTION PERSON" with respect to a Transaction shall mean (x) any
Person who (i) is or will become an Acquiring Person or a Principal Party (as
such term is defined in Section 13(b) hereof) if the Transaction were to be
consummated and (ii) directly or indirectly proposed or nominated a director of
the Company which director is in office at the time of consideration of the
Transaction, or (y) an Affiliate or Associate of such a Person.

SECTION 2. APPOINTMENT OF RIGHTS AGENT. The Company hereby appoints the
Rights Agent to act as agent for the Company and the holders of the Rights (who,
in accordance with Section 3 hereof, shall prior to the Distribution Date also
be the holders of the Common Shares) in accordance with the terms and conditions
hereof, and the Rights Agent hereby accepts such appointment. The Company may
from time to time appoint such co-Rights Agents as it may deem necessary or
desirable.

SECTION 3. ISSUE OF RIGHT CERTIFICATES.

(a) Until the earlier of (i) the Shares Acquisition Date or (ii) the tenth
business day (or such later date as may be determined by action of the Board of
Directors prior to such time as any Person becomes an Acquiring Person) after
the date of the commencement (determined in accordance with Rule 14d-2 under the
Exchange Act) by any Person (other than the Company, any Subsidiary of the
Company, any employee benefit plan of the Company or of any Subsidiary of the
Company or any entity holding Common Shares for or pursuant to the terms of any
such plan) of, or of the first public announcement of the intention of any
Person (other than the Company, any Subsidiary of the Company, any employee
benefit plan of the Company or of any Subsidiary of the Company or any entity
holding Common Shares for or pursuant to the terms of any such plan) to
commence, a tender or exchange offer (which intention to commence remains in
effect for five Business Days after such announcement), the consummation of
which would result in any Person becoming an Acquiring Person (including any
such date which is after the date of this Agreement and prior to the issuance of
the Rights, the earlier of such dates being herein referred to as the
"Distribution Date"), (x) the Rights will be evidenced by the certificates for
Common Shares registered in the names of the holders thereof (which certificates
shall also be deemed to be Right Certificates) and not by separate Right
Certificates, and (y) the Rights (and the right to receive Right Certificates
therefor) will be transferable only in connection with the transfer of Common
Shares. As soon as practicable after the Distribution Date, the Company will
prepare and execute, the Rights Agent will countersign, and the Company will
send or cause to be sent (and the Rights Agent will, if requested, send) by
first-class, insured, postage-prepaid mail, to each record holder of Common
Shares as of the close of business on the Distribution Date, at the address of
such holder shown on the records of the Company, a Right Certificate, in
substantially the form of Exhibit B hereto (a "Right Certificate"), evidencing
one Right for each Common Share so held. As of the Distribution Date, the
Rights will be evidenced solely by such Right Certificates.

(b) On the Record Date, or as soon as practicable thereafter, the Company
will send a copy of a Summary of Rights to Purchase Preferred Shares, in
substantially the form of Exhibit C hereto (the "Summary of Rights"), by first-
class, postage-prepaid mail, to each record holder of Common Shares as of the
close of business on the Record Date, at the address of such holder shown on the
records of the Company. With respect to certificates for Common Shares
outstanding as of the Record Date, until the Distribution Date, the Rights will
be evidenced by such certificates registered in the names of the holders
thereof. Until the Distribution Date (or the earlier of the Redemption Date and
the Final Expiration Date), the surrender for transfer of any certificate for
Common Shares outstanding on the Record Date shall also constitute the transfer
of the Rights associated with the Common Shares represented thereby.

(c) Certificates for Common Shares which become outstanding (including,
without limitation, reacquired Common Shares referred to in the last sentence of
this paragraph (c)) after the Record Date but prior to the earliest of the
Distribution Date, the Redemption Date or the Final Expiration Date shall have
impressed on, printed on, written on or otherwise affixed to them the following
legend:

This certificate also evidences and entitles the holder hereof
to certain rights as set forth in a Rights Agreement between NPS
Pharmaceuticals, Inc. and American Securities Transfer & Trust,
Inc., dated as of December 4, 1996, as amended from time to time
(the "Rights Agreement"), the terms of which are hereby
incorporated herein by reference and a copy of which is on file
at the principal executive offices of NPS Pharmaceuticals, Inc.
Under certain circumstances, as set forth in the Rights
Agreement, such Rights will be evidenced by separate
certificates and will no longer be evidenced by this
certificate. NPS Pharmaceuticals, Inc. will mail to the holder
of this certificate a copy of the Rights Agreement without
charge after receipt of a written request therefor. As
described in the Rights Agreement, Rights issued to any Person
who becomes an Acquiring Person or an Affiliate or Associate
thereof (as defined in the Rights Agreement) and certain related
persons, whether currently held by or on behalf of such Person
or by any subsequent holder shall become null and void.

With respect to such certificates containing the foregoing legend, until the
Distribution Date, the Rights associated with the Common Shares represented by
such certificates shall be evidenced by such certificates alone, and the
surrender for transfer of any such certificate shall also constitute the
transfer of the Rights associated with the Common Shares represented thereby.
In the event that the Company purchases or acquires any Common Shares after the
Record Date but prior to the Distribution Date, any Rights associated with such
Common Shares shall be deemed canceled and retired so that the Company shall not
be entitled to exercise any Rights associated with the Common Shares which are
no longer outstanding.

SECTION 4. FORM OF RIGHT CERTIFICATES.

(a) The Right Certificates (and the form of election to purchase Preferred
Shares, the form of assignment and the form of certification to be printed on
the reverse thereof) shall be substantially the same as Exhibit B hereto and may
have such marks of identification or designation and such legends, summaries or
endorsements printed thereon as the Company may deem appropriate and as are not
inconsistent with the provisions of this Agreement, or as may be required to
comply with any applicable law or with any rule or regulation made pursuant
thereto or with any rule or regulation of any stock exchange on which the Rights
may from time to time be listed, or to conform to usage. Subject to the
provisions of Section 22 hereof, the Right Certificates shall entitle the
holders thereof to purchase such number of one one-hundredths of a Preferred
Share as shall be set forth therein at the price per one one-hundredth of a
Preferred Share set forth therein (the "Purchase Price"), but the number of such
one one-hundredths of a Preferred Share and the Purchase Price shall be subject
to adjustment as provided herein.

(b) Any Right Certificate issued pursuant to Section 3(a) or Section 22
hereof that represents Rights which are null and void pursuant to Section
11(a)(ii) of this Agreement and

any Right Certificate issued pursuant to Section 6 or Section 11 hereof upon
transfer, exchange, replacement or adjustment of any other Right Certificate
referred to in this sentence, shall contain (to the extent feasible) the
following legend:

The Rights represented by this Right Certificate are or were
beneficially owned by a Person who was or became an Acquiring
Person or an Affiliate or Associate of an Acquiring Person (as
such terms are defined in the Rights Agreement). Accordingly,
this Right Certificate and the Rights represented hereby are
null and void.

The provisions of Section 11(a)(ii) of this Rights Agreement shall be operative
whether or not the foregoing legend is contained on any such Right Certificate.

SECTION 5. COUNTERSIGNATURE AND REGISTRATION. The Right Certificates shall
be executed on behalf of the Company by its Chairman of the Board, its Chief
Executive Officer, its President, its Vice Chairman of the Board, its Chief
Financial Officer, or any of its Vice Presidents, either manually or by
facsimile signature, shall have affixed thereto the Company's seal or a
facsimile thereof, and shall be attested by the Secretary or an Assistant
Secretary of the Company, either manually or by facsimile signature. The Right
Certificates shall be manually countersigned by the Rights Agent and shall not
be valid for any purpose unless countersigned. In case any officer of the
Company who shall have signed any of the Right Certificates shall cease to be
such officer of the Company before countersignature by the Rights Agent and
issuance and delivery by the Company, such Right Certificates, nevertheless, may
be countersigned by the Rights Agent and issued and delivered by the Company
with the same force and effect as though the person who signed such Right
Certificates had not ceased to be such officer of the Company; and any Right
Certificate may be signed on behalf of the Company by any person who, at the
actual date of the execution of such Right Certificate, shall be a proper
officer of the Company to sign such Right Certificate, although at the date of
the execution of this Rights Agreement any such person was not such an officer.

Following the Distribution Date, the Rights Agent will keep or cause to be
kept, at its office designated for such purpose, books for registration and
transfer of the Right Certificates issued hereunder. Such books shall show the
names and addresses of the respective holders of the Right Certificates, the
number of Rights evidenced on its face by each of the Right Certificates and the
date of each of the Right Certificates.

SECTION 6. TRANSFER, SPLIT UP, COMBINATION AND EXCHANGE OF RIGHT
CERTIFICATES; MUTILATED, DESTROYED, LOST OR STOLEN RIGHT CERTIFICATES. Subject
to the provisions of Section 4(b), Section 11(a)(ii), Section 14 and Section 24
hereof, at any time after the close of business on the Distribution Date, and at
or prior to the close of business on the earlier of the Redemption Date or the
Final Expiration Date, any Right Certificate or Right Certificates may be
transferred, split up, combined or exchanged for another Right Certificate or
Right Certificates, entitling the registered holder to purchase a like number of
one one-hundredths of a Preferred Share as the Right Certificate or Right
Certificates surrendered then entitled such

holder to purchase. Any registered holder desiring to transfer, split up,
combine or exchange any Right Certificate or Right Certificates shall make
such request in writing delivered to the Rights Agent, and shall surrender
the Right Certificate or Right Certificates to be transferred, split up,
combined or exchanged at the office of the Rights Agent designated for such
purpose. Neither the Rights Agent nor the Company shall be obligated to take
any action whatsoever with respect to the transfer of any such surrendered
Right Certificate until the registered holder shall have completed and signed
the certificate contained in the form of assignment on the reverse side of
such Right Certificate and shall have provided such additional evidence of
the identity of the Beneficial Owner (or former Beneficial Owner) or
Affiliates or Associates thereof as the Company shall reasonably request.
Thereupon the Rights Agent shall, subject to Section 4(b), Section 11(a)(ii),
Section 14 and Section 24 hereof, countersign and deliver to the person
entitled thereto a Right Certificate or Right Certificates, as the case may
be, as so requested. The Company may require payment of a sum sufficient to
cover any tax or governmental charge that may be imposed in connection with
any transfer, split up, combination or exchange of Right Certificates.

Upon receipt by the Company and the Rights Agent of evidence reasonably
satisfactory to them of the loss, theft, destruction or mutilation of a Right
Certificate, and, in case of loss, theft or destruction, of indemnity or
security reasonably satisfactory to them, and, at the Company's request,
reimbursement to the Company and the Rights Agent of all reasonable expenses
incidental thereto, and upon surrender to the Rights Agent and cancellation of
the Right Certificate if mutilated, the Company will issue, execute and deliver
a new Right Certificate of like tenor to the Rights Agent for countersignature
and delivery to the registered holder in lieu of the Right Certificate so lost,
stolen, destroyed or mutilated.

SECTION 7. EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE OF RIGHTS.

(a) The registered holder of any Right Certificate may exercise the Rights
evidenced thereby (except as otherwise provided herein) in whole or in part at
any time after the Distribution Date upon surrender of the Right Certificate,
with the form of election to purchase on the reverse side thereof duly executed,
to the Rights Agent at the office of the Rights Agent designated for such
purpose, together with payment of the Purchase Price for each one one-hundredth
of a Preferred Share (or such other number of shares or other securities) as to
which the Rights are exercised, at or prior to the earliest of (i) the close of
business on December 31, 2001 (the "Final Expiration Date"), (ii) the time at
which the Rights are redeemed as provided in Section 23 hereof (the "Redemption
Date"), or (iii) the time at which such Rights are exchanged as provided in
Section 24 hereof.

(b) The Purchase Price for each one one-hundredth of a Preferred Share
pursuant to the exercise of a Right shall initially be $50.00, shall be subject
to adjustment from time to time as provided in Sections 11 and 13 hereof and
shall be payable in lawful money of the United States of America in accordance
with paragraph (c) below.

(c) Upon receipt of a Right Certificate representing exercisable Rights,
with the form of election to purchase duly executed, accompanied by payment of
the Purchase Price for the

shares to be purchased and an amount equal to any applicable transfer tax
required to be paid by the holder of such Right Certificate in accordance
with Section 9 hereof by certified check, cashier's check, bank draft or
money order payable to the order of the Company, the Rights Agent shall
thereupon promptly (i) (A) requisition from any transfer agent for the
Preferred Shares certificates for the number of Preferred Shares to be
purchased and the Company hereby irrevocably authorizes its transfer agent to
comply with all such requests, or (B) if the Company, in its sole discretion,
shall have elected to deposit the Preferred Shares issuable upon exercise of
the Rights hereunder into a depository, requisition from the depositary agent
depositary receipts representing such number of one one-hundredths of a
Preferred Share as are to be purchased (in which case certificates for the
Preferred Shares represented by such receipts shall be deposited by the
transfer agent with the depositary agent) and the Company hereby directs the
depositary agent to comply with such request, (ii) when appropriate,
requisition from the Company the amount of cash to be paid in lieu of
issuance of fractional shares in accordance with Section 14 hereof, (iii)
after receipt of such certificates or depositary receipts, cause the same to
be delivered to or upon the order of the registered holder of such Right
Certificate, registered in such name or names as may be designated by such
holder and (iv) when appropriate, after receipt, deliver such cash to or upon
the order of the registered holder of such Right Certificate. In the event
that the Company is obligated to issue securities of the Company other than
Preferred Shares (including Common Shares) of the Company pursuant to Section
11(a) hereof, the Company will make all arrangements necessary so that such
other securities are available for distribution by the Rights Agent, if and
when appropriate.

In addition, in the case of an exercise of the Rights by a holder pursuant to
Section 11(a)(ii), the Rights Agent shall return such Right Certificate to the
registered holder thereof after imprinting, stamping or otherwise indicating
thereon that the rights represented by such Right Certificate no longer include
the rights provided by Section 11(a)(ii) of the Rights Agreement, and, if fewer
than all the Rights represented by such Right Certificate were so exercised, the
Rights Agent shall indicate on the Right Certificate the number of Rights
represented thereby which continue to include the rights provided by Section
11(a)(ii).

(d) In case the registered holder of any Right Certificate shall exercise
fewer than all the Rights evidenced thereby, a new Right Certificate evidencing
Rights equivalent to the Rights remaining unexercised shall be issued by the
Rights Agent to the registered holder of such Right Certificate or to his duly
authorized assigns, subject to the provisions of Section 14 hereof.

(e) The Company covenants and agrees that it will cause to be reserved and
kept available out of its authorized and unissued Preferred Shares or any
Preferred Shares held in its treasury, the number of Preferred Shares that will
be sufficient to permit the exercise in full of all outstanding Rights in
accordance with this Section 7.

(f) Notwithstanding anything in this Agreement to the contrary, neither the
Rights Agent nor the Company shall be obligated to undertake any action with
respect to a registered holder upon the occurrence of any purported exercise as
set forth in this Section 7 unless such registered holder shall have
(i) completed and signed the certification following the form of election to
purchase set forth on the reverse side of the Rights Certificate surrendered for
such

exercise and (ii) provided such additional evidence of the identity of the
Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates
thereof as the Company shall reasonably request.

SECTION 8. CANCELLATION AND DESTRUCTION OF RIGHT CERTIFICATES. All Right
Certificates surrendered for the purpose of exercise, transfer, split up,
combination or exchange shall, if surrendered to the Company or to any of its
agents, be delivered to the Rights Agent for cancellation or in canceled form,
or, if delivered or surrendered to the Rights Agent, shall be canceled by it,
and no Right Certificates shall be issued in lieu thereof except as expressly
permitted by any of the provisions of this Rights Agreement. The Company shall
deliver to the Rights Agent for cancellation and retirement, and the Rights
Agent shall so cancel and retire, any other Right Certificate purchased or
acquired by the Company otherwise than upon the exercise thereof. The Rights
Agent shall deliver all canceled Right Certificates to the Company, or shall, at
the written request of the Company, destroy such canceled Right Certificates,
and in such case shall deliver a certificate of destruction thereof to the
Company.

SECTION 9. AVAILABILITY OF PREFERRED SHARES. The Company covenants and
agrees that so long as the Preferred Shares (and, after the time a person
becomes an Acquiring Person, Common Shares or any other securities) issuable
upon the exercise of the Rights may be listed on any national securities
exchange or quotation system, the Company shall use its best efforts to cause,
from and after such time as the Rights become exercisable, all shares reserved
for such issuance to be listed on such exchange or quotation system upon
official notice of issuance upon such exercise.

The Company covenants and agrees that it will take all such action as may be
necessary to ensure that all Preferred Shares (or Common Shares and other
securities, as the case may be) delivered upon exercise of Rights shall, at the
time of delivery of the certificates for such Preferred Shares (subject to
payment of the Purchase Price), be duly and validly authorized and issued and
fully paid and nonassessable shares or other securities.

The Company further covenants and agrees that it will pay when due and
payable any and all federal and state transfer taxes and charges which may be
payable in respect of the issuance or delivery of the Right Certificates or of
any Preferred Shares upon the exercise of Rights. The Company shall not,
however, be required to pay any transfer tax which may be payable in respect of
any transfer or delivery of Right Certificates to a person other than, or the
issuance or delivery of certificates or depositary receipts for the Preferred
Shares in a name other than that of, the registered holder of the Right
Certificate evidencing Rights surrendered for exercise or to issue or to deliver
any certificates or depositary receipts for Preferred Shares upon the exercise
of any Rights until any such tax shall have been paid (any such tax being
payable by the holder of such Right Certificate at the time of surrender) or
until it has been established to the Company's reasonable satisfaction that no
such tax is due.

As soon as practicable after the Shares Acquisition Date, the Company shall
use its best efforts to:

10.

(i) prepare and file a registration statement under the Securities Act
of 1933, as amended (the "Act"), with respect to the Rights and the
securities purchasable upon exercise of the Rights on an appropriate form,
will use its best efforts to cause such registration statement to become
effective as soon as practicable after such filing and will use its best
efforts to cause such registration statement to remain effective (with a
prospectus at all times meeting the requirements of the Act) until the Final
Expiration Date; and

(ii) use its best efforts to qualify or register the Rights and the
securities purchasable upon exercise of the Rights under the blue sky laws of
such jurisdictions as may be necessary or appropriate.

SECTION 10. PREFERRED SHARES RECORD DATE. Each person in whose name any
certificate for Preferred Shares or other securities is issued upon the exercise
of Rights shall for all purposes be deemed to have become the holder of record
of the Preferred Shares or other securities represented thereby on, and such
certificate shall be dated, the date upon which the Right Certificate evidencing
such Rights was duly surrendered with the forms of election and certification
duly executed and payment of the Purchase Price (and any applicable transfer
taxes) was made; PROVIDED, HOWEVER, that if the date of such surrender and
payment is a date upon which the Preferred Shares or other securities transfer
books of the Company are closed, such person shall be deemed to have become the
record holder of such shares on, and such certificate shall be dated, the next
succeeding Business Day on which the Preferred Shares or other securities
transfer books of the Company are open. Prior to the exercise of the Rights
evidenced thereby, the holder of a Right Certificate, as such, shall not be
entitled to any rights of a holder of Preferred Shares for which the Rights
shall be exercisable, including, without limitation, the right to vote, to
receive dividends or other distributions or to exercise any preemptive rights,
and shall not be entitled to receive any notice of any proceedings of the
Company, except as provided herein.

SECTION 11. ADJUSTMENT OF PURCHASE PRICE, NUMBER OF SHARES OR NUMBER OF
RIGHTS. The Purchase Price, the number of Preferred Shares covered by each
Right and the number of Rights outstanding are subject to adjustment from time
to time as provided in this Section 11.

(a) (i) In the event the Company shall at any time after the date of this
Agreement (A) declare a dividend on the Preferred Shares payable in Preferred
Shares, (B) subdivide the outstanding Preferred Shares, (C) combine the
outstanding Preferred Shares into a smaller number of Preferred Shares or
(D) issue any shares of its capital stock in a reclassification of the Preferred
Shares (including any such reclassification in connection with a consolidation
or merger in which the Company is the continuing or surviving corporation),
except as otherwise provided in this Section 11(a), the Purchase Price in effect
at the time of the record date for such dividend or of the effective date of
such subdivision, combination or reclassification, and the number and kind of
shares of capital stock issuable on such date, shall be proportionately adjusted
so that the holder of any Right exercised after such time shall be entitled to
receive the aggregate number and kind of shares of capital stock which, if such
Right had been exercised immediately prior to such date and at a time when the
Preferred Shares transfer books of the

11.

Company were open, such holder would have owned upon such exercise and been
entitled to receive by virtue of such dividend, subdivision, combination or
reclassification; PROVIDED, HOWEVER, that in no event shall the consideration
to be paid upon the exercise of one Right be less than the aggregate par
value of the shares of capital stock of the Company issuable upon exercise of
one Right. If an event occurs which would require an adjustment under both
Section 11(a)(i) and Section 11(a)(ii), the adjustment provided for in this
Section 11(a)(i) shall be in addition to, and shall be made prior to any
adjustment required pursuant to Section 11(a)(ii).

(ii) Subject to Section 24 of this Agreement, in the event any Person
shall become an Acquiring Person, each holder of a Right shall, for a period of
60 days after the later of such time any Person becomes an Acquiring Person or
the effective date of an appropriate registration statement under the Act
pursuant to Section 9 hereof (PROVIDED, HOWEVER that, if at any time prior to
the expiration or termination of the Rights there shall be a temporary
restraining order, a preliminary injunction, an injunction, or temporary
suspension by the Board of Directors, or similar obstacle to exercise of the
Rights (the "Injunction") which prevents exercise of the Rights, a new 60-day
period shall commence on the date the Injunction is removed), have a right to
receive, upon exercise thereof at a price equal to the then current Purchase
Price multiplied by the number of one one-hundredths of a Preferred Share for
which a Right is then exercisable, in accordance with the terms of this
Agreement and in lieu of Preferred Shares, such number of Common Shares of the
Company as shall equal the result obtained by (A) multiplying the then current
Purchase Price by the number of one one-hundredths of a Preferred Share for
which a Right is then exercisable and dividing that product by (B) 50% of the
then current per share market price of the Company's Common Shares (determined
pursuant to Section 11(d) hereof) on the date such Person became an Acquiring
Person; PROVIDED, HOWEVER, that if the transaction that would otherwise give
rise to the foregoing adjustment is also subject to the provisions of Section 13
hereof, then only the provisions of Section 13 hereof shall apply and no
adjustment shall be made pursuant to this Section 11(a)(ii). In the event that
any Person shall become an Acquiring Person and the Rights shall then be
outstanding, the Company shall not take any action which would eliminate or
diminish the benefits intended to be afforded by the Rights.

Notwithstanding anything in this Agreement to the contrary, from and after
the time any Person becomes an Acquiring Person, any Rights beneficially
owned by (i) such Acquiring Person or an Associate or Affiliate of such
Acquiring Person, (ii) a transferee of such Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee after the Acquiring Person
became such, or (iii) a transferee of such Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee prior to or concurrently
with the Acquiring Person's becoming such and receives such Rights pursuant
to either (A) a transfer (whether or not for consideration) from the
Acquiring Person to holders of equity interests in such Acquiring Person or
to any Person with whom the Acquiring Person has any continuing agreement,
arrangement or understanding regarding the transferred Rights or (B) a
transfer which the Board of Directors of the Company has determined is part
of a plan, arrangement or understanding which has as a primary purpose or
effect the avoidance of this Section 11(a)(ii), shall become null and void
without any further action and no holder of such Rights shall have any rights
whatsoever with

12.

respect to such Rights, whether under any provision of this Agreement or
otherwise. The Company shall use all reasonable efforts to insure that the
provisions of this Section 11(a)(ii) and Section 4(b) are complied with, but
shall have no liability to any holder of Right Certificates or other Person
as a result of its failure to make any determinations with respect to an
Acquiring Person or its Affiliates, Associates or transferees hereunder. No
Right Certificate shall be issued at any time upon the transfer of any Rights
to an Acquiring Person whose Rights would be void pursuant to the preceding
sentence or any Associate or Affiliate thereof or to any nominee of such
Acquiring Person, Associate or Affiliate; and any Right Certificate delivered
to the Rights Agent for transfer to an Acquiring Person whose Rights would be
void pursuant to the preceding sentence shall be canceled.

(iii) In the event that there shall not be sufficient Common
Shares issued but not outstanding or authorized but unissued to permit the
exercise in full of the Rights in accordance with the foregoing subparagraph
(ii), the Company shall take all such action as may be necessary to authorize
additional Common Shares for issuance upon exercise of the Rights. In the
event that the Company shall, after a good faith effort, be unable to take
all such action as may be necessary to authorize such additional Common
Shares, the Company shall substitute, for each Common Share that would
otherwise be issuable upon exercise of a Right, a number of Preferred Shares
or fraction thereof such that the current per share market price of one
Preferred Share multiplied by such number or fraction thereof is equal to the
current per share market price of one Common Share as of the date of issuance
of such Preferred Shares or fraction thereof; PROVIDED, HOWEVER, that if the
Company is further unable to cause the authorization of a sufficient number
of Preferred Shares, then, in the event the Rights become so exercisable, the
Board of Directors may, but shall not be required to, with respect to each
Right (A) pay cash in an amount equal to the Purchase Price, in lieu of
issuing Common Shares and requiring payment therefor, or (B) issue debt or
equity securities or a combination thereof, having a value equal to the
Current Value of the Common Shares (as defined hereinafter), where the value
of such securities shall be determined by a nationally recognized investment
banking firm selected by the Board of Directors of the Company, and require
the payment of the Purchase Price, or (C) deliver any combination of cash,
property, Common Shares, Preferred Shares and/or other securities having a
value equal to the Current Value, and require payment of all or any requisite
portions of the Purchase Price. The Current Value shall be the product of
the current market price per share of Common Shares (determined pursuant to
Section 11(d) on the date of the occurrence of the event described above in
subparagraph (ii)) multiplied by the number of Common Shares for which the
Right otherwise would be exercisable if there were sufficient shares
available. To the extent that the Company determines that some action need
be taken pursuant to the second sentence of this subparagraph (iii), the
Board of Directors may temporarily suspend the exercisability of the Rights
for a period of up to 45 days following the date on which the event described
in Section 11(a)(ii) shall have occurred, in order to seek any authorization
of additional Common Shares and/or to decide the appropriate form of
distribution to be made pursuant to the above provision and to determine the
value thereof. In the event of any such suspension, the Company shall issue
a public announcement stating that the exercisability of the Rights has been
temporarily suspended.

13.

(b) In case the Company shall fix a record date for the issuance of rights,
options or warrants to all holders of Preferred Shares entitling them (for a
period expiring within 45 calendar days after such record date) to subscribe for
or purchase Preferred Shares (or shares having the same designations and the
powers, preferences and rights, and the qualifications, limitations and
restrictions as the Preferred Shares ("equivalent preferred shares")) or
securities convertible into Preferred Shares or equivalent preferred shares at a
price per Preferred Share or equivalent preferred share (or having a conversion
price per share, if a security convertible into Preferred Shares or equivalent
preferred shares) less than the then current per share market price of the
Preferred Shares (as defined in Section 11(d)) on such record date, the Purchase
Price to be in effect after such record date shall be determined by multiplying
the Purchase Price in effect immediately prior to such record date by a
fraction, the numerator of which shall be the number of Preferred Shares
outstanding on such record date plus the number of Preferred Shares which the
aggregate offering price of the total number of Preferred Shares and/or
equivalent preferred shares so to be offered (and/or the aggregate initial
conversion price of the convertible securities so to be offered) would purchase
at such current market price and the denominator of which shall be the number of
Preferred Shares outstanding on such record date plus the number of additional
Preferred Shares and/or equivalent preferred shares to be offered for
subscription or purchase (or into which the convertible securities so to be
offered are initially convertible); PROVIDED, HOWEVER, that in no event shall
the consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Company issuable upon
exercise of one Right. In case such subscription price may be paid in a
consideration part or all of which shall be in a form other than cash, the value
of such consideration shall be as determined in good faith by the Board of
Directors of the Company, whose determination shall be described in a statement
filed with the Rights Agent. Preferred Shares owned by or held for the account
of the Company shall not be deemed outstanding for the purpose of any such
computation. Such adjustment shall be made successively whenever such a record
date is fixed; and in the event that such rights, options or warrants are not so
issued, the Purchase Price shall be adjusted to be the Purchase Price which
would then be in effect if such record date had not been fixed.

(c) In case the Company shall fix a record date for the making of a
distribution to all holders of the Preferred Shares (including any such
distribution made in connection with a consolidation or merger in which the
Company is the continuing or surviving corporation) of evidences of indebtedness
or assets (other than a regular quarterly cash dividend or a dividend payable in
Preferred Shares) or subscription rights or warrants (excluding those referred
to in Section 11(b) hereof), the Purchase Price to be in effect after such
record date shall be determined by multiplying the Purchase Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the then current per share market price of the Preferred Shares (as
defined in Section 11(d)) on such record date, less the fair market value (as
determined in good faith by the Board of Directors of the Company, whose
determination shall be described in a statement filed with the Rights Agent) of
the portion of the assets or evidences of indebtedness so to be distributed or
of such subscription rights or warrants applicable to one Preferred Share and
the denominator of which shall be such current per share market price of the
Preferred Shares; PROVIDED, HOWEVER, that in no event shall the consideration to
be paid upon the exercise of one Right be less than the aggregate par value of
the shares of capital stock of

14.

the Company to be issued upon exercise of one Right. Such adjustments shall
be made successively whenever such a record date is fixed; and in the event
that such distribution is not so made, the Purchase Price shall again be
adjusted to be the Purchase Price which would then be in effect if such
record date had not been fixed.

(d) (i) For the purpose of any computation hereunder, the "current per
share market price" of any security (a "Security" for the purpose of this
Section 11(d)(i)) on any date shall be deemed to be the average of the daily
closing prices per share of such Security for the 30 consecutive Trading Days
(as such term is hereinafter defined) immediately prior to such date; PROVIDED,
HOWEVER, that in the event that the current per share market price of the
Security is determined during a period following the announcement by the issuer
of such Security of (A) a dividend or distribution on such Security payable in
shares of such Security or securities convertible into such shares, or (B) any
subdivision, combination or reclassification of such Security or securities
convertible into such shares, or (C) any subdivision, combination or
reclassification of such Security and prior to the expiration of 30 Trading Days
after the ex-dividend date for such dividend or distribution, or the record date
for such subdivision, combination or reclassification, then, and in each such
case, the current per share market price shall be appropriately adjusted to
reflect the current market price per share equivalent of such Security. The
closing price for each day shall be the last sale price, regular way, or, in
case no such sale takes place on such day, the average of the closing bid and
asked prices, regular way, in either case as reported in the principal
consolidated transaction reporting system with respect to securities listed or
admitted to trading on the New York Stock Exchange or, if the Security is not
listed or admitted to trading on the New York Stock Exchange, as reported in the
principal consolidated transaction reporting system with respect to securities
listed on the principal national securities exchange on which the Security is
listed or admitted to trading or as reported on the Nasdaq National Market or,
if the Security is not listed or admitted to trading on any national securities
exchange or reported on the Nasdaq National Market, the last quoted price or, if
not so quoted, the average of the high bid and low asked prices in the over-the-
counter market, as reported by the National Association of Securities Dealers,
Inc. Automated Quotations System ("Nasdaq") or such other system then in use,
or, if on any such date the Security is not quoted by any such organization, the
average of the closing bid and asked prices as furnished by a professional
market maker making a market in the Security selected by the Board of Directors
of the Company. The term "Trading Day" shall mean a day on which the principal
national securities exchange on which the Security is listed or admitted to
trading is open for the transaction of business or, if the Security is not
listed or admitted to trading on any national securities exchange, a Business
Day.

(ii) For the purpose of any computation hereunder, the "current per
share market price" of the Preferred Shares shall be determined in accordance
with the method set forth in Section 11(d)(i). If the Preferred Shares are not
publicly traded, the "current per share market price" of the Preferred Shares
shall be conclusively deemed to be the current per share market price of the
Common Shares as determined pursuant to Section 11(d)(i) (appropriately adjusted
to reflect any stock split, stock dividend or similar transaction occurring
after the date hereof) multiplied by one hundred. If neither the Common Shares
nor the Preferred Shares are publicly held or so listed or traded, "current per
share market price" shall mean the fair value

15.

per share as determined in good faith by the Board of Directors of the
Company, whose determination shall be described in a statement filed with the
Rights Agent.

(e) No adjustment in the Purchase Price shall be required unless such
adjustment would require an increase or decrease of at least 1% in the Purchase
Price; PROVIDED, HOWEVER, that any adjustments which by reason of this
Section 11(e) are not required to be made shall be carried forward and taken
into account in any subsequent adjustment. All calculations under this
Section 11 shall be made to the nearest cent or to the nearest one one-hundredth
of a Preferred Share or one ten-thousandth of any other share or security as the
case may be. Notwithstanding the first sentence of this Section 11(e), any
adjustment required by this Section 11 shall be made no later than the earlier
of (i) three years from the date of the transaction which requires such
adjustment or (ii) the date of the expiration of the right to exercise any
Rights.

(f) If as a result of an adjustment made pursuant to Section 11(a) hereof,
the holder of any Right thereafter exercised shall become entitled to receive
any shares of capital stock of the Company other than Preferred Shares,
thereafter the number of such other shares so receivable upon exercise of any
Right shall be subject to adjustment from time to time in a manner and on terms
as nearly equivalent as practicable to the provisions with respect to the
Preferred Shares contained in Section 11(a) through (c), inclusive, and the
provisions of Sections 7, 9, 10, 13 and 14 with respect to the Preferred Shares
shall apply on like terms to any such other shares.

(g) All Rights originally issued by the Company subsequent to any adjustment
made to the Purchase Price hereunder shall evidence the right to purchase, at
the adjusted Purchase Price, the number of one one-hundredths of a Preferred
Share purchasable from time to time hereunder upon exercise of the Rights, all
subject to further adjustment as provided herein.

(h) Unless the Company shall have exercised its election as provided in
Section 11(i), upon each adjustment of the Purchase Price as a result of the
calculations made in Section 11(b) and (c), each Right outstanding immediately
prior to the making of such adjustment shall thereafter evidence the right to
purchase, at the adjusted Purchase Price, that number of one one-hundredths of a
Preferred Share (calculated to the nearest one one-millionth of a Preferred
Share) obtained by (i) multiplying (x) the number of one one-hundredths of a
Preferred Share covered by a Right immediately prior to this adjustment by
(y) the Purchase Price in effect immediately prior to such adjustment of the
Purchase Price and (ii) dividing the product so obtained by the Purchase Price
in effect immediately after such adjustment of the Purchase Price.

(i) The Company may elect on or after the date of any adjustment of the
Purchase Price to adjust the number of Rights, in substitution for any
adjustment in the number of one one-hundredths of a Preferred Share purchasable
upon the exercise of a Right. Each of the Rights outstanding after such
adjustment of the number of Rights shall be exercisable for the number of one
one-hundredths of a Preferred Share for which a Right was exercisable
immediately prior to such adjustment. Each Right held of record prior to such
adjustment of the number of Rights shall become that number of Rights
(calculated to the nearest one ten-thousandth) obtained by dividing the Purchase
Price in effect immediately prior to adjustment

16.

of the Purchase Price by the Purchase Price in effect immediately after
adjustment of the Purchase Price. The Company shall make a public
announcement of its election to adjust the number of Rights, indicating the
record date for the adjustment, and, if known at the time, the amount of the
adjustment to be made. This record date may be the date on which the
Purchase Price is adjusted or any day thereafter, but, if the Right
Certificates have been issued, shall be at least 10 days later than the date
of the public announcement. If Right Certificates have been issued, upon
each adjustment of the number of Rights pursuant to this Section 11(i), the
Company shall, as promptly as practicable, cause to be distributed to holders
of record of Right Certificates on such record date Right Certificates
evidencing, subject to Section 14 hereof, the additional Rights to which such
holders shall be entitled as a result of such adjustment, or, at the option
of the Company, shall cause to be distributed to such holders of record in
substitution and replacement for the Right Certificates held by such holders
prior to the date of adjustment, and upon surrender thereof, if required by
the Company, new Right Certificates evidencing all the Rights to which such
holders shall be entitled after such adjustment. Right Certificates so to be
distributed shall be issued, executed and countersigned in the manner
provided for herein and shall be registered in the names of the holders of
record of Right Certificates on the record date specified in the public
announcement.

(j) Irrespective of any adjustment or change in the Purchase Price or the
number of one one-hundredths of a Preferred Share issuable upon the exercise of
the Rights, the Right Certificates theretofore and thereafter issued may
continue to express the Purchase Price and the number of one one-hundredths of a
Preferred Share which were expressed in the initial Right Certificates issued
hereunder.

(k) Before taking any action that would cause an adjustment reducing the
Purchase Price below one one-hundredth of the then par value, if any, of the
Preferred Shares issuable upon exercise of the Rights, the Company shall take
any corporate action which may, in the opinion of its counsel, be necessary in
order that the Company may validly and legally issue fully paid and
nonassessable Preferred Shares at such adjusted Purchase Price.

(l) In any case in which this Section 11 shall require that an adjustment in
the Purchase Price be made effective as of a record date for a specified event,
the Company may elect to defer until the occurrence of such event the issuing to
the holder of any Right exercised after such record date of the Preferred Shares
and other capital stock or securities of the Company, if any, issuable upon such
exercise on the basis of the Purchase Price in effect prior to such adjustment;
PROVIDED, HOWEVER, that the Company shall deliver to such holder a due ▇▇▇▇ or
other appropriate instrument evidencing such holder's right to receive such
additional shares upon the occurrence of the event requiring such adjustment.

(m) The Company covenants and agrees that, after the Distribution Date, it
will not, except as permitted by Section 23 or Section 27 hereof, take (or
permit any Subsidiary to take) any action the purpose of which is to, or if at
the time such action is taken it is reasonably foreseeable that the effect of
such action is to, materially diminish or eliminate the benefits intended to be
afforded by the Rights.

17.

(n) Anything in this Section 11 to the contrary notwithstanding, the Company
shall be entitled to make such reductions in the Purchase Price, in addition to
those adjustments expressly required by this Section 11, as and to the extent
that it in its sole discretion shall determine to be advisable in order that any
consolidation or subdivision of the Preferred Shares, issuance wholly for cash
of any Preferred Shares at less than the current market price, issuance wholly
for cash of Preferred Shares or securities which by their terms are convertible
into or exchangeable for Preferred Shares, dividends on Preferred Shares payable
in Preferred Shares or issuance of rights, options or warrants referred to
hereinabove in Section 11(b), hereafter made by the Company to holders of its
Preferred Shares shall not be taxable to such stockholders.

(o) In the event that at any time after the date of this Agreement and prior
to the Distribution Date, the Company shall (i) declare or pay any dividend on
the Common Shares payable in Common Shares or (ii) effect a subdivision,
combination or consolidation of the Common Shares (by reclassification or
otherwise than by payment of dividends in Common Shares) into a greater or
lesser number of Common Shares, then in any such case (A) the number of one one-
hundredths of a Preferred Share purchasable after such event upon proper
exercise of each Right shall be determined by multiplying the number of one one-
hundredths of a Preferred Share so purchasable immediately prior to such event
by a fraction, the numerator of which is the number of Common Shares outstanding
immediately before such event and the denominator of which is the number of
Common Shares outstanding immediately after such event, and (B) each Common
Share outstanding immediately after such event shall have issued with respect to
it that number of Rights which each Common Share outstanding immediately prior
to such event had issued with respect to it. The adjustments provided for in
this Section 11(o) shall be made successively whenever such a dividend is
declared or paid or such a subdivision, combination or consolidation is
effected.

(p) The exercise of Rights under Section 11(a)(ii) shall only result in the
loss of rights under Section 11(a)(ii) to the extent so exercised and shall not
otherwise affect the rights represented by the Rights under this Rights
Agreement, including the rights represented by Section 13.

SECTION 12. CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF SHARES.
Whenever an adjustment is made as provided in Sections 11 and 13 hereof, the
Company shall promptly (a) prepare a certificate setting forth such adjustment,
and a brief statement of the facts accounting for such adjustment, (b) file with
the Rights Agent and with each transfer agent for the Common Shares or the
Preferred Shares a copy of such certificate and (c) mail a brief summary thereof
to each holder of a Right Certificate in accordance with Section 25 hereof. The
Rights Agent shall be fully protected in relying on any such certificate and on
any adjustment therein contained and shall not be deemed to have knowledge of
any adjustment unless and until it shall have received such certificate.

18.

SECTION 13. CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS OR EARNING
POWER.

(a) In the event that, following the Shares Acquisition Date, directly or
indirectly (x) the Company shall consolidate with, or merge with and into, any
other Person, (y) any Person shall consolidate with the Company, or merge with
and into the Company, and the Company shall be the continuing or surviving
corporation of such merger (other than, in the case of either transaction
described in (x) or (y), a merger or consolidation which would result in all of
the voting power represented by the securities of the Company outstanding
immediately prior thereto continuing to represent (either by remaining
outstanding or by being converted into securities of the surviving entity) all
of the voting power represented by the securities of the Company or such
surviving entity outstanding immediately after such merger or consolidation and
the holders of such securities not having changed as a result of such merger or
consolidation), or (z) the Company shall sell, mortgage or otherwise transfer
(or one or more of its subsidiaries shall sell, mortgage or otherwise transfer),
in one or more transactions, assets or earning power aggregating more than 50%
of the assets or earning power of the Company and its subsidiaries (taken as a
whole) to any other Person, (other than the Company or any Subsidiary of the
Company in one or more transactions each of which individually and the aggregate
does not violate Section 13(d) hereof) then, and in each such case, proper
provision shall be made so that (i) following the Distribution Date, each holder
of a Right, subject to Section 11(a)(ii), shall have the right to receive, upon
the exercise thereof at a price equal to the then current Purchase Price
multiplied by the number of one one-hundredths of a Preferred Share for which a
Right is then exercisable in accordance with the terms of this Agreement and in
lieu of Preferred Shares, such number of shares of freely tradeable Common
Shares of the Principal Party (as hereinafter defined), free and clear of liens,
rights of call or first refusal, encumbrances or other adverse claims, as shall
be equal to the result obtained by (A) multiplying the then current Purchase
Price by the number of one one-hundredths of a Preferred Share for which a Right
is then exercisable (without taking into account any adjustment previously made
pursuant to Section 11(a)(ii) hereof) and dividing that product by (B) 50% of
the then current per share market price of the Common Shares of such Principal
Party (determined pursuant to Section 11(d) hereof) on the date of consummation
of such consolidation, merger, sale or transfer; (ii) such Principal Party shall
thereafter be liable for, and shall assume, by virtue of such consolidation,
merger, sale or transfer, all the obligations and duties of the Company pursuant
to this Agreement; (iii) the term "Company" shall thereafter be deemed to refer
to such Principal Party, it being specifically intended that the provisions of
Section 11 hereof shall apply to such Principal Party; and (iv) such Principal
Party shall take such steps (including, but not limited to, the reservation of a
sufficient number of shares of its Common Shares in accordance with Section 9
hereof) in connection with such consummation as may be necessary to assure that
the provisions hereof shall thereafter be applicable, as nearly as reasonably
may be, in relation to its Common Shares thereafter deliverable upon the
exercise of the Rights.

(b) "Principal Party" shall mean:

(i) in the case of any transaction described in (x) or (y) of the first
sentence of Section 13(a), the Person that is the issuer of any securities
into which Common Shares of the Company are converted in such merger or
consolidation, and if no

19.

securities are so issued, the Person that is the other party to the merger
or consolidation (including, if applicable, the Company, if it is the
surviving corporation); and

(ii) in the case of any transaction described in (z) of the first
sentence in Section 13(a), the Person that is the party receiving the
greatest portion of the assets or earning power transferred pursuant to such
transaction or transactions;

PROVIDED, HOWEVER, that in any case, (1) if the Common Shares of such Person are
not at such time and have not been continuously over the preceding 12-month
period registered under Section 12 of the Exchange Act, and such Person is a
direct or indirect subsidiary or Affiliate of another Person the Common Shares
of which are and have been so registered, "Principal Party" shall refer to such
other Person; (2) in case such Person is a subsidiary, directly or indirectly,
or Affiliate of more than one Person, the Common Shares of two or more of which
are and have been so registered, "Principal Party" shall refer to whichever of
such Persons is the issuer of the Common Shares having the greatest aggregate
market value; and (3) in case such Person is owned, directly or indirectly, by a
joint venture formed by two or more Persons that are not owned, directly or
indirectly, by the same Person, the rules set forth in (1) and (2) above shall
apply to each of the chains of ownership having an interest in such joint
venture as if such party were a "subsidiary" of both or all of such joint
venturers and the Principal Parties in each such chain shall bear the
obligations set forth in this Section 13 in the same ratio as their direct or
indirect interests in such Person bear to the total of such interests.

(c) The Company shall not consummate any such consolidation, merger, sale or
transfer unless the Principal Party shall have a sufficient number of authorized
shares of its Common Shares that have not been issued or reserved for issuance
to permit the exercise in full of the Rights in accordance with this Section 13
and unless prior thereto the Company and each Principal Party and each other
Person who may become a Principal Party as a result of such consolidation,
merger, sale or transfer shall have executed and delivered to the Rights Agent a
supplemental agreement providing for the terms set forth in paragraphs (a) and
(b) of this Section 13 and further providing that, as soon as practicable after
the date of any consolidation, merger, sale or transfer of assets mentioned in
paragraph (a) of this Section 13, the Principal Party at its own expense will:

(i) prepare and file a registration statement under the Act with
respect to the Rights and the securities purchasable upon exercise of the
Rights on an appropriate form, will use its best efforts to cause such
registration statement to become effective as soon as practicable after such
filing and will use its best efforts to cause such registration statement to
remain effective (with a prospectus at all times meeting the requirements of
the Act) until the Final Expiration Date;

20.

(iii) deliver to holders of the Rights historical financial
statements for the Principal Party and each of its Affiliates which comply in
all material respects with the requirements for registration on Form 10 under
the Exchange Act.

The provisions of this Section 13 shall similarly apply to successive mergers or
consolidations or sales or other transfers.

(d) After the Distribution Date, the Company covenants and agrees that it
shall not (i) consolidate with, (ii) merge with or into, or (iii) sell or
transfer to, in one or more transactions, assets or earning power aggregating
more than 50% of the assets or earning power of the Company and its subsidiaries
taken as a whole, any other Person (other than a Subsidiary of the Company in a
transaction which does not violate Section 11(m) hereof), if (x) at the time of
or after such consolidation, merger or sale there are any charter or bylaw
provisions or any rights, warrants or other instruments or securities
outstanding, agreements in effect or any other action taken which would diminish
or otherwise eliminate the benefits intended to be afforded by the Rights or (y)
prior to, simultaneously with or immediately after such consolidation, merger or
sale, the stockholders of the Person who constitutes, or would constitute, the
"Principal Party" for purposes of Section 13(a) hereof shall have received a
distribution of Rights previously owned by such Person or any of its Affiliates
and Associates. The Corporation shall not consummate any such consolidation,
merger, sale or transfer unless prior thereto the Company and such other Person
shall have executed and delivered to the Rights Agent a supplemental agreement
evidencing compliance with this Section 13(d).

SECTION 14. FRACTIONAL RIGHTS AND FRACTIONAL SHARES.

(a) The Company shall not be required to issue fractions of Rights or to
distribute Right Certificates which evidence fractional Rights. In lieu of such
fractional Rights, there shall be paid to the registered holders of the Right
Certificates with regard to which such fractional Rights would otherwise be
issuable, an amount in cash equal to the same fraction of the current market
value of a whole Right. For the purposes of this Section 14(a), the current
market value of a whole Right shall be the closing price of the Rights for the
Trading Day immediately prior to the date on which such fractional Rights would
have been otherwise issuable. The closing price for any day shall be the last
sale price, regular way, or, in case no such sale takes place on such day, the
average of the closing bid and asked prices, regular way, in either case as
reported in the principal consolidated transaction reporting system with respect
to securities listed or admitted to trading on the New York Stock Exchange or,
if the Rights are not listed or admitted to trading on the New York Stock
Exchange, as reported in the principal consolidated transaction reporting system
with respect to securities listed on the principal national securities exchange
on which the Rights are listed or admitted to trading or as reported on the
Nasdaq National Market or, if the Rights are not listed or admitted to trading
on any national securities exchange or reported on the Nasdaq National Market,
the last quoted price or, if not so quoted, the average of the high bid and low
asked prices in the over-the-counter market, as reported by Nasdaq or such other
system then in use or, if on any such date the Rights are not quoted by any such
organization, the average of the closing bid and asked prices as furnished by a
professional market maker making a market in the Rights selected by the Board of
Directors of

21.

the Company. If on any such date no such market maker is making a market in
the Rights, the fair value of the Rights on such date as determined in good
faith by the Board of Directors of the Company shall be used.

(b) The Company shall not be required to issue fractions of Preferred Shares
(other than fractions which are integral multiples of one one-hundredth of a
Preferred Share) upon exercise of the Rights or to distribute certificates which
evidence fractional Preferred Shares (other than fractions which are integral
multiples of one one-hundredth of a Preferred Share). Fractions of Preferred
Shares in integral multiples of one one-hundredth of a Preferred Share may, at
the election of the Company, be evidenced by depositary receipts; PROVIDED,
HOWEVER, that holders of such depositary receipts shall have all of the
designations and the powers, preferences and rights, and the qualifications,
limitations and restrictions to which they are entitled as beneficial owners of
the Preferred Shares represented by such depositary receipts. In lieu of
fractional Preferred Shares that are not integral multiples of one one-hundredth
of a Preferred Share, the Company shall pay to the registered holders of Right
Certificates at the time such Rights are exercised as herein provided an amount
in cash equal to the same fraction of the current market value of one Preferred
Share. For the purposes of this Section 14(b), the current market value of a
Preferred Share shall be the current per share market price of the Preferred
Shares (as determined pursuant to the second sentence of Section 11(d)(i)
hereof) for the Trading Day immediately prior to the date of such exercise (or,
if not publicly traded, in accordance with Section 11(d)(ii)).

(c) Following the occurrence of one of the transactions or events specified
in Section 11 giving rise to the right to receive Common Shares, capital stock
equivalents (other than Preferred Shares) or other securities upon the exercise
of a Right, the Company shall not be required to issue fractions of Common
Shares or units of such Common Shares, capital stock equivalents or other
securities upon exercise of the Rights or to distribute certificates which
evidence fractional Common Shares, capital stock equivalents or other
securities. In lieu of fractional Common Shares, capital stock equivalents or
other securities, the Company shall pay to the registered holders of Right
Certificates at the time such Rights are exercised as herein provided an amount
in cash equal to the same fraction of the current market value of one Common
Share or unit of such Common Shares, capital stock equivalents or other
securities. For purposes of this Section 14(c), the current market value shall
be the current per share market price (as determined pursuant to Section
11(d)(i) hereof) for the Trading Day immediately prior to the date of such
exercise and, if such capital stock equivalent is not traded, each such capital
stock equivalent shall have the value of one one-hundredth of a Preferred Share.

(d) The holder of a Right by the acceptance of the Right expressly waives
his right to receive any fractional Rights or any fractional shares upon
exercise of a Right (except as provided above).

SECTION 15. RIGHTS OF ACTION. All rights of action in respect of this
Agreement, excepting the rights of action given to the Rights Agent under
Sections 18 and 20 hereof, are vested in the respective registered holders of
the Right Certificates (and, prior to the Distribution

22.

Date, the registered holders of the Common Shares) and any registered holder
of any Right Certificate (or, prior to the Distribution Date, of the Common
Shares), without the consent of the Rights Agent or of the holder of any
other Right Certificate (or, prior to the Distribution Date, of the Common
Shares), may, in his own behalf and for his own benefit, enforce, and may
institute and maintain any suit, action or proceeding against the Company to
enforce, or otherwise act in respect of, his right to exercise the Rights
evidenced by such Right Certificate in the manner provided in such Right
Certificate and in this Agreement. Without limiting the foregoing or any
remedies available to the holders of Rights, it is specifically acknowledged
that the holders of Rights would not have an adequate remedy at law for any
breach of this Agreement and will be entitled to specific performance of the
obligations under, and injunctive relief against actual or threatened
violations of the obligations of any Person subject to, this Agreement.
Holders of Rights shall be entitled to recover the reasonable costs and
expenses, including attorneys fees, incurred by them in any action to enforce
the provisions of this Agreement.

SECTION 16. AGREEMENT OF RIGHT HOLDERS. Every holder of a Right, by
accepting the same, consents and agrees with the Company and the Rights Agent
and with every other holder of a Right that:

(a) prior to the Distribution Date, the Rights will be transferable
only in connection with the transfer of the Common Shares;

(b) after the Distribution Date, the Right Certificates are
transferable only on the registry books of the Rights Agent if surrendered at
the principal office of the Rights Agent, duly endorsed or accompanied by a
proper instrument of transfer; and

(c) the Company and the Rights Agent may deem and treat the person in
whose name the Right Certificate (or, prior to the Distribution Date, the
associated Common Shares certificate) is registered as the absolute owner
thereof and of the Rights evidenced thereby (notwithstanding any notations of
ownership or writing on the Right Certificates or the associated Common Shares
certificate made by anyone other than the Company or the Rights Agent) for all
purposes whatsoever, and neither the Company nor the Rights Agent shall be
affected by any notice to the contrary.

SECTION 17. RIGHT CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER. No holder,
as such, of any Right Certificate shall be entitled to vote, receive dividends
or be deemed for any purpose the holder of the Preferred Shares or any other
securities of the Company which may at any time be issuable on the exercise of
the Rights represented thereby, nor shall anything contained herein or in any
Right Certificate be construed to confer upon the holder of any Right
Certificate, as such, any of the rights of a stockholder of the Company or any
right to vote for the election of directors or upon any matter submitted to
stockholders at any meeting thereof, or to give or withhold consent to any
corporate action, or to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 25 hereof), or to receive dividends
or subscription rights, or otherwise, until the Right or Rights evidenced by
such Right Certificate shall have been exercised in accordance with the
provisions hereof.

23.

SECTION 18. CONCERNING THE RIGHTS AGENT. The Company agrees to pay to the
Rights Agent reasonable compensation for all services rendered by it hereunder
and, from time to time, on demand of the Rights Agent, its reasonable expenses
and counsel fees and other disbursements incurred in the administration and
execution of this Agreement and the exercise and performance of its duties
hereunder. The Company also agrees to indemnify the Rights Agent for, and to
hold it harmless against, any loss, liability, or expense, incurred without
negligence, bad faith or willful misconduct on the part of the Rights Agent, for
anything done or omitted by the Rights Agent in connection with the acceptance
and administration of this Agreement, including the costs and expenses of
defending against any claim of liability in the premises. The indemnity
provided herein shall survive the expiration of the Rights and the termination
of this Agreement.

The Rights Agent shall be protected and shall incur no liability for, or in
respect of any action taken, suffered or omitted by it in connection with, its
administration of this Agreement in reliance upon any Right Certificate or
certificate for the Preferred Shares or Common Shares or for other securities of
the Company, instrument of assignment or transfer, power of attorney,
endorsement, affidavit, letter, notice, direction, consent, certificate,
statement, or other paper or document believed by it to be genuine and to be
signed, executed and, where necessary, verified or acknowledged, by the proper
person or persons, or otherwise upon the advice of counsel as set forth in
Section 20 hereof.

SECTION 19. MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT. Any
corporation into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any corporation resulting from
any merger or consolidation to which the Rights Agent or any successor Rights
Agent shall be a party, or any corporation succeeding to the shareholder
services or corporate trust business of the Rights Agent or any successor Rights
Agent, shall be the successor to the Rights Agent under this Agreement without
the execution or filing of any paper or any further act on the part of any of
the parties hereto, PROVIDED, HOWEVER that such corporation would be eligible
for appointment as a successor Rights Agent under the provisions of Section 21
hereof. In case at the time such successor Rights Agent shall succeed to the
agency created by this Agreement any of the Right Certificates shall have been
countersigned but not delivered, any such successor Rights Agent may adopt the
countersignature of the predecessor Rights Agent and deliver such Right
Certificates so countersigned; and in case at that time any of the Right
Certificates shall not have been countersigned, any successor Rights Agent may
countersign such Right Certificates either in the name of the predecessor Rights
Agent or in the name of the successor Rights Agent; and in all such cases such
Right Certificates shall have the full force provided in the Right Certificates
and in this Agreement.

In case at any time the name of the Rights Agent shall be changed and at such
time any of the Right Certificates shall have been countersigned but not
delivered, the Rights Agent may adopt the countersignature under its prior name
and deliver Right Certificates so countersigned; and in case at that time any of
the Right Certificates shall not have been countersigned, the Rights Agent may
countersign such Right Certificates either in its prior name or in its changed

24.

name; and in all such cases such Right Certificates shall have the full force
provided in the Right Certificates and in this Agreement.

SECTION 20. DUTIES OF RIGHTS AGENT. The Rights Agent undertakes the duties
and obligations imposed by this Agreement upon the following terms and
conditions, by all of which the Company and the holders of Right Certificates,
by their acceptance thereof, shall be bound:

(a) The Rights Agent may consult with legal counsel of its choice (who may
be legal counsel for the Company), and the opinion of such counsel shall be full
and complete authorization and protection to the Rights Agent as to any action
taken or omitted by it in good faith and in accordance with such opinion.

(b) Whenever in the performance of its duties under this Agreement the
Rights Agent shall deem it necessary or desirable that any fact or matter be
proved or established by the Company prior to taking or suffering any action
hereunder, such fact or matter (unless other evidence in respect thereof be
herein specifically prescribed) may be deemed to be conclusively proved and
established by a certificate signed by any one of the Chairman of the Board, the
Chief Executive Officer, the President, the Chief Financial Officer, any Vice
President, the Treasurer or the Secretary of the Company and delivered to the
Rights Agent; and such certificate shall be full authorization to the Rights
Agent for any action taken or suffered in good faith by it under the provisions
of this Agreement in reliance upon such certificate.

(c) The Rights Agent shall be liable hereunder to the Company and any other
Person only for its own negligence, bad faith or willful misconduct.

(d) The Rights Agent shall not be liable for or by reason of any of the
statements of fact or recitals contained in this Agreement or in the Right
Certificates (except its countersignature thereof) or be required to verify the
same, but all such statements and recitals are and shall be deemed to have been
made by the Company only.

(e) The Rights Agent shall not be under any responsibility in respect of the
validity of this Agreement or the execution and delivery hereof (except the due
execution hereof by the Rights Agent) or in respect of the validity or execution
of any Right Certificate (except its countersignature thereof); nor shall it be
responsible for any breach by the Company of any covenant or condition contained
in this Agreement or in any Right Certificate; nor shall it be responsible for
any change in the exercisability of the Rights (including the Rights becoming
void pursuant to Section 11(a)(ii) hereof) or any adjustment in the terms of the
Rights (including the manner, method or amount thereof) provided for in
Section 3, 11, 13, 23 or 24, or the ascertaining of the existence of facts that
would require any such change or adjustment (except with respect to the exercise
of Rights evidenced by Right Certificates after receipt of a certificate
pursuant to Section 12 describing such change or adjustment); nor shall it by
any act hereunder be deemed to make any representation or warranty as to the
authorization or reservation of any Preferred Shares to be issued pursuant to
this Agreement or any Right Certificate or as to whether any Preferred Shares
will, when issued, be validly authorized and issued, fully paid and
nonassessable.

25.

(f) The Company agrees that it will perform, execute, acknowledge and
deliver or cause to be performed, executed, acknowledged and delivered all such
further and other acts, instruments and assurances as may reasonably be required
by the Rights Agent for the carrying out or performing by the Rights Agent of
the provisions of this Agreement.

(g) The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from any
one of the Chairman of the Board, the Chief Executive Officer, the President,
the Chief Financial Officer, any Vice President, the Secretary or the Treasurer
of the Company, and to apply to such officers for advice or instructions in
connection with its duties, and it shall not be liable for any action taken or
suffered by it in good faith in accordance with instructions of any such officer
or for any delay in acting while waiting for those instructions. Any
application by the Rights Agent for written instructions from the Company may,
at the option of the Rights Agent, set forth in writing any action proposed to
be taken or omitted by the Rights Agent with respect to its duties or
obligations under this Rights Agreement and the date on and/or after which such
action shall be taken or omitted and the Rights Agent shall not be liable for
any action taken or omitted in accordance with a proposal included in any such
application on or after the date specified therein (which date shall not be less
than three business days after the date indicated in such application unless any
such officer shall have consented in writing to an earlier date) unless, prior
to taking or omitting any such action, the Rights Agent has received written
instructions in response to such application specifying the action to be taken
or omitted.

(h) The Rights Agent and any stockholder, director, officer or employee of
the Rights Agent may buy, sell or deal in any of the Rights or other securities
of the Company or become pecuniarily interested in any transaction in which the
Company may be interested, or contract with or lend money to the Company or
otherwise act as fully and freely as though it were not Rights Agent under this
Agreement. Nothing herein shall preclude the Rights Agent from acting in any
other capacity for the Company or for any other legal entity.

(i) The Rights Agent may execute and exercise any of the rights or powers
hereby vested in it or perform any duty hereunder either itself or by or through
its attorneys or agents, and the Rights Agent shall not be answerable or
accountable for any act, default, neglect or misconduct of any such attorneys or
agents or for any loss to the Company resulting from any such act, default,
neglect or misconduct, provided reasonable care was exercised in the selection
and continued employment thereof.

(j) No provision of this Agreement shall require the Rights Agent to expend
or risk its own funds or otherwise incur any financial liability in the
performance of any of its duties hereunder or in the exercise of its rights if
there shall be reasonable grounds for believing that repayment of such funds or
adequate indemnification against such risk or liability is not reasonably
assured to it.

(k) If, with respect to any Right Certificate surrendered to the Rights
Agent for exercise or transfer, the certificate attached to the form of
assignment or form of election to purchase, as the case may be, has not been
executed, the Rights Agent shall not take any further

26.

action with respect to such requested exercise of transfer without first
consulting with the Company.

SECTION 21. CHANGE OF RIGHTS AGENT. The Rights Agent or any successor
Rights Agent may resign and be discharged from its duties under this Agreement
upon 30 days' notice in writing mailed to the Company and to each transfer agent
for the Common Shares or Preferred Shares by registered or certified mail, and
to the holders of the Right Certificates by first-class mail. The Company may
remove the Rights Agent or any successor Rights Agent upon 30 days' notice in
writing, mailed to the Rights Agent or successor Rights Agent, as the case may
be, and to each transfer agent for the Common Shares or Preferred Shares by
registered or certified mail, and to the holders of the Right Certificates by
first-class mail. If the Rights Agent shall resign or be removed or shall
otherwise become incapable of acting, the Company shall appoint a successor to
the Rights Agent. If the Company shall fail to make such appointment within a
period of 30 days after giving notice of such removal or after it has been
notified in writing of such resignation or incapacity by the resigning or
incapacitated Rights Agent or by the holder of a Right Certificate (who shall,
with such notice, submit his Right Certificate for inspection by the Company),
then the registered holder of any Right Certificate may apply to any court of
competent jurisdiction for the appointment of a new Rights Agent. Any successor
Rights Agent, whether appointed by the Company or by such a court, shall be a
corporation organized and doing business under the laws of the United States or
of any other state of the United States which is authorized under such laws to
exercise corporate trust or stock transfer powers and is subject to supervision
or examination by federal or state authority and which has at the time of its
appointment as Rights Agent a combined capital and surplus of at least $50
million. After appointment, the successor Rights Agent shall be vested with the
same powers, rights, duties and responsibilities as if it had been originally
named as Rights Agent without further act or deed; but the predecessor Rights
Agent shall deliver and transfer to the successor Rights Agent any property at
the time held by it hereunder, and execute and deliver any further assurance,
conveyance, act or deed necessary for the purpose. Not later than the effective
date of any such appointment the Company shall file notice thereof in writing
with the predecessor Rights Agent and each transfer agent for the Common Shares
or Preferred Shares, and mail a notice thereof in writing to the registered
holders of the Right Certificates. Failure to give any notice provided for in
this Section 21, however, or any defect therein, shall not affect the legality
or validity of the resignation or removal of the Rights Agent or the appointment
of the successor Rights Agent, as the case may be.

SECTION 22. ISSUANCE OF NEW RIGHT CERTIFICATES. Notwithstanding any of the
provisions of this Agreement or of the Rights to the contrary, the Company may,
at its option, issue new Right Certificates evidencing Rights in such form as
may be approved by its Board of Directors to reflect any adjustment or change in
the Purchase Price and the number or kind or class of shares or other securities
or property purchasable under the Right Certificates made in accordance with the
provisions of this Agreement. In addition, in connection with the issuance or
sale of Common Shares following the Distribution Date and prior to the earlier
of the Redemption Date and the Final Expiration Date, the Company (a) shall with
respect to Common Shares so issued or sold pursuant to the exercise of stock
options or under any employee plan or arrangement, or upon the exercise,
conversion or exchange of securities, notes or debentures

27.

issued by the Company, and (b) may, in any other case, if deemed necessary or
appropriate by the Board of Directors of the Company, issue Right
Certificates representing the appropriate number of Rights in connection with
such issuance or sale; PROVIDED, HOWEVER, that (i) the Company shall not be
obligated to issue any such Right Certificates if, and to the extent that,
the Company shall be advised by counsel that such issuance would create a
significant risk of material adverse tax consequences to the Company or the
Person to whom such Right Certificate would be issued, and (ii) no Right
Certificate shall be issued if, and to the extent that, appropriate
adjustment shall otherwise have been made in lieu of the issuance thereof.

SECTION 23. REDEMPTION.

(a) The Rights may be redeemed by action of the Board of Directors pursuant
to subsection (b) of this Section 23 and shall not be redeemed in any other
manner.

(b)(i) The Board of Directors of the Company may, at its option, at any
time prior to the earlier of (ii) the Shares Acquisition Date; or (iii) the
Final Expiration Date, redeem all but not less than all the then outstanding
Rights at a redemption price of $.01 per Right, appropriately adjusted to
reflect any stock split, stock dividend or similar transaction occurring after
the date hereof (such redemption price being hereinafter referred to as the
"Redemption Price"), and the Company may, at its option, pay the Redemption
Price in Common Shares (based on the "current per share market price," as
defined in Section 11(d) hereof, of the Common Shares at the time of
redemption), cash or any other form of consideration deemed appropriate by the
Board of Directors. The redemption of the Rights by the Board of Directors may
be made effective at such time, on such basis and subject to such conditions as
the Board of Directors in its sole discretion may establish. Notwithstanding
anything contained in this Agreement to the contrary, the Rights shall not be
exercisable pursuant to Section 11(a)(ii) hereof prior to the expiration or
termination of the Company's right of redemption hereunder.

(ii) In addition, the Board of Directors of the Company may, at its option,
at any time after the time a person becomes an Acquiring Person and the
expiration of any period during which the holder of Rights may exercise the
rights under Section 11(a)(ii) but prior to any event described in (x), (y) or
(z) of the first sentence of Section 13, redeem all but not less than all of the
then outstanding Rights at the Redemption Price (x) in connection with any
merger, consolidation or sale or other transfer (in one transaction or in a
series of related transactions) of assets or earning power aggregating 50% or
more of the earning power of the Company and its subsidiaries (taken as a whole)
in which all holders of Common Shares are treated alike and not involving (other
than as a holder of Common Shares being treated like all other such holders) an
Interested Stockholder or a Transaction Person or (y)(A) if and for so long as
the Acquiring Person is not thereafter the Beneficial Owner of 20% or more of
the Company's then outstanding Common Shares, and (B) at the time of redemption
no other Persons are Acquiring Persons.

(c) Immediately upon the action of the Board of Directors of the Company
ordering the redemption of the Rights pursuant to subsection (b) of this
Section 23, and without any further action and without any notice, the right to
exercise the Rights will terminate and the only

28.

right thereafter of the holders of Rights shall be to receive the Redemption
Price. The Company shall promptly give public notice of any such redemption;
PROVIDED, HOWEVER, that the failure to give, or any defect in, any such
notice shall not affect the validity of such redemption. Within 10 days
after such action of the Board of Directors ordering the redemption of the
Rights pursuant to subsection (b) the Company shall mail a notice of
redemption to all the holders of the then outstanding Rights at their last
addresses as they appear upon the registry books of the Rights Agent or,
prior to the Distribution Date, on the registry books of the transfer agent
for the Common Shares. Any notice which is mailed in the manner herein
provided shall be deemed given, whether or not the holder receives the
notice. Each such notice of redemption will state the method by which the
payment of the Redemption Price will be made. Neither the Company nor any of
its Affiliates or Associates may redeem, acquire or purchase for value any
Rights at any time in any manner other than that specifically set forth in
this Section 23 or in Section 24 hereof, and other than in connection with
the purchase of Common Shares prior to the Distribution Date.

(d) The Company may, at its option, discharge all of its obligations with
respect to the Rights by (i) issuing a press release announcing the manner of
redemption of the Rights and (ii) mailing payment of the Redemption Price to the
registered holders of the Rights at their last addresses as they appear on the
registry books of the Rights Agent or, prior to the Distribution Date, on the
registry books of the transfer agent for the Common Shares, and upon such
action, all outstanding Right Certificates shall be null and void without any
further action by the Company.

SECTION 24. EXCHANGE.

(a) The Board of Directors of the Company may, at its option, at any time
after any Person becomes an Acquiring Person, exchange all or part of the then
outstanding and exercisable Rights (which shall not include Rights that have
become void pursuant to the provisions of Section 11(a)(ii) hereof) for Common
Shares at an exchange ratio of one Common Share per Right, appropriately
adjusted to reflect any stock split, stock dividend or similar transaction
occurring after the date hereof (such exchange ratio being hereinafter referred
to as the "Exchange Ratio"). Notwithstanding the foregoing, the Board of
Directors shall not be empowered to effect such exchange at any time after any
Person (other than the Company, any Subsidiary of the Company, any employee
benefit plan of the Company or any such Subsidiary, or any entity holding Common
Shares for or pursuant to the terms of any such plan), together with all
Affiliates and Associates of such Person, becomes the Beneficial Owner of 50% or
more of the Common Shares then outstanding.

(b) Immediately upon the action of the Board of Directors of the Company
ordering the exchange of any Rights pursuant to subsection (a) of this
Section 24 and without any further action and without any notice, the right to
exercise such Rights shall terminate and the only right thereafter of a holder
of such Rights shall be to receive that number of Common Shares equal to the
number of such Rights held by such holder multiplied by the Exchange Ratio. The
Company shall promptly give public notice of any such exchange; PROVIDED,
HOWEVER, that the failure to give, or any defect in, such notice shall not
affect the validity of such exchange. The

29.

Company promptly shall mail a notice of any such exchange to all of the
holders of such Rights at their last addresses as they appear upon the
registry books of the Rights Agent. Any notice which is mailed in the manner
herein provided shall be deemed given, whether or not the holder receives the
notice. Each such notice of exchange will state the method by which the
exchange of the Common Shares for Rights will be effected and, in the event
of any partial exchange, the number of Rights which will be exchanged. Any
partial exchange shall be effected pro rata based on the number of Rights
(other than Rights which have become void pursuant to the provisions of
Section 11(a)(ii) hereof) held by each holder of Rights.

(c) In the event that there shall not be sufficient Common Shares issued but
not outstanding or authorized but unissued to permit any exchange of Rights as
contemplated in accordance with this Section 24, the Company shall take all such
action as may be necessary to authorize additional Common Shares for issuance
upon exchange of the Rights. In the event that the Company shall, after a good
faith effort, be unable to take all such action as may be necessary to authorize
such additional Common Shares, the Company shall substitute, for each Common
Share that would otherwise be issuable upon exchange of a Right, a number of
Preferred Shares or fraction thereof such that the current per share market
price of one Preferred Share multiplied by such number or fraction thereof
multiplied by such number or fraction is equal to the current per share market
price of one Common Share as of the date of issuance of such Preferred Shares or
fraction thereof; PROVIDED, HOWEVER, that if the Company is further unable to
cause the authorization of a sufficient number of additional Common Shares,
then, in the event the Rights become so exchangeable, the Board of Directors
may, but shall not be required to, with respect to each Right (A) pay cash in an
amount equal to the current per share market price of one Common Share
(determined pursuant to Section 11(d) on the date of the occurrence of the event
described in Section 11(a)(ii)) in exchange for each Right, in lieu of issuing
Common Shares, or (B) issue debt or equity securities or a combination thereof,
having a value equal to the current per share market price of one Common Share
(determined pursuant to Section 11(d) on the date of the occurrence of the event
described in Section 11(a)(ii)) where the value of such securities shall be
determined by a nationally recognized investment banking firm selected by the
Board of Directors of the Company, in exchange for each Right, or (C) deliver
any combination of cash, property, Common Shares and/or other securities having
a value equal to the current per share market price of one Common Share
(determined pursuant to Section 11(d) on the date of the occurrence of the event
described in Section 11(2)(ii)) in exchange for each Right. To the extent that
the Company determines that some action need be taken pursuant to the second
sentence of this Section 24(c), the Board of Directors may temporarily suspend
the exercisability of the Rights for a period of up to 45 days following the
date on which the event described in Section 11(a)(ii) shall have occurred, in
order to seek any authorization of additional Common Shares and/or to decide the
appropriate form of distribution to be made pursuant to the above provision and
to determine the value thereof. In the event of any such suspension, the
Company shall issue a public announcement stating that the exercisability of the
Rights has been temporarily suspended.

(d) The Company shall not be required to issue fractions of Common Shares or
to distribute certificates which evidence fractional Common Shares. In lieu of
such fractional Common Shares, the Company shall pay to the registered holders
of the Right Certificates with

30.

regard to which such fractional Common Shares would otherwise be issuable an
amount in cash equal to the same fraction of the current market value of a
whole Common Share. For the purposes of this subsection (d), the current
market value of a whole Common Share shall be the closing price of a Common
Share (as determined pursuant to the second sentence of Section 11(d)(i)
hereof) for the Trading Day immediately after the date of the first public
announcement by the Company that an exchange is to be effected pursuant to
this Section 24.

(e) The Company shall not be required to issue fractions of Preferred Shares
(other than fractions which are integral multiples of one one-hundredth of a
Preferred Share) upon exchange of the Rights or to distribute certificates which
evidence fractional Preferred Shares (other than fractions which are integral
multiples of one one-hundredth of a Preferred Share). Fractions of Preferred
Shares in integral multiples of one one-hundredth of a Preferred Share may, at
the election of the Company, be evidenced by depositary receipts; PROVIDED,
HOWEVER, that holders of such depositary receipts shall have all of the
designations and the powers, preferences and rights, and the qualifications,
limitations and restrictions to which they are entitled as beneficial owners of
the Preferred Shares represented by such depositary receipts. In lieu of
fractional Preferred Shares that are not integral multiples of one one-hundredth
of a Preferred Share, the Company shall pay to the registered holders of Right
Certificates at the time such Rights are exercised as herein provided an amount
in cash equal to the same fraction of the current market value of one Preferred
Share. For the purposes of this Section 24(e), the current market value of a
Preferred Share shall be the closing price of a Preferred Share (as determined
pursuant to the second sentence of Section 11(d)(i) hereof) for the Trading Day
immediately after the date of the first public announcement by the Company that
an exchange is to be effected pursuant to this Section 24.

SECTION 25. NOTICE OF CERTAIN EVENTS.

(a) In case the Company shall propose (i) to pay any dividend payable in
stock of any class to the holders of its Preferred Shares or to make any other
distribution to the holders of its Preferred Shares (other than a regular
quarterly cash dividend), (ii) to offer to the holders of its Preferred Shares
rights or warrants to subscribe for or to purchase any additional Preferred
Shares or shares of stock of any class or any other securities, rights or
options, (iii) to effect any reclassification of its Preferred Shares (other
than a reclassification involving only the subdivision of outstanding Preferred
Shares), (iv) to effect any consolidation or merger into or with, or to effect
any sale or other transfer (or to permit one or more of its Subsidiaries to
effect any sale or other transfer), in one or more transactions, of 50% or more
of the assets or earning power of the Company and its Subsidiaries (taken as a
whole), to any other Person, (v) to effect the liquidation, dissolution or
winding up of the Company, or (vi) to declare or pay any dividend on the Common
Shares payable in Common Shares or to effect a subdivision, combination or
consolidation of the Common Shares (by reclassification or otherwise than by
payment of dividends in Common Shares), then, in each such case, the Company
shall give to each holder of a Right Certificate, in accordance with Section 26
hereof, a notice of such proposed action, which shall specify the record date
for the purpose of such stock dividend, or distribution of rights or warrants,
or the date on which such reclassification, consolidation, merger, sale,
transfer, liquidation, dissolution, or winding up is to take place and the date
of participation

31.

therein by the holders of the Common Shares and/or the Preferred Shares, if
any such date is to be fixed, and such notice shall be so given in the case
of any action covered by clause (i) or (ii) above at least 10 days prior to
the record date for determining holders of the Preferred Shares for purposes
of such action, and in the case of any such other action, at least 10 days
prior to the date of the taking of such proposed action or the date of
participation therein by the holders of the Common Shares and/or the
Preferred Shares, whichever shall be the earlier.

(b) In case the event set forth in Section 11(a)(ii) hereof shall occur,
then the Company shall as soon as practicable thereafter give to each holder of
a Right Certificate, in accordance with Section 26 hereof, a notice of the
occurrence of such event, which notice shall describe the event and the
consequences of the event to holders of Rights under Section 11(a)(ii) hereof.

SECTION 26. NOTICES. Notices or demands authorized by this Agreement to be
given or made by the Rights Agent or by the holder of any Right Certificate to
or on the Company shall be sufficiently given or made if sent by first-class
mail, postage prepaid, addressed (until another address is filed in writing with
the Rights Agent) as follows:

NPS PHARMACEUTICALS, INC.
▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇
▇▇▇▇ ▇▇▇▇ ▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇
Attention: ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, Ph.D.

Subject to the provisions of Section 21 hereof, any notice or demand authorized
by this Agreement to be given or made by the Company or by the holder of any
Right Certificate to or on the Rights Agent shall be sufficiently given or made
if sent by first-class mail, postage prepaid, addressed (until another address
is filed in writing with the Company) as follows:

AMERICAN SECURITIES TRANSFER & TRUST, INC.
▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇
▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇▇
Attention: Shareholder Services

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to the holder of any Right Certificate shall be
sufficiently given or made if sent by first-class mail, postage prepaid,
addressed to such holder at the address of such holder as shown on the registry
books of the Company.

SECTION 27. SUPPLEMENTS AND AMENDMENTS. The Company may from time to time
supplement or amend this Agreement without the approval of any holders of Right
Certificates in order to cure any ambiguity, to correct or supplement any
provision contained herein which may be defective or inconsistent with any other
provisions herein, or to make any other provisions with respect to the Rights
which the Company may deem necessary or desirable, any such supplement or
amendment to be evidenced by a writing signed by the Company and the Rights
Agent; PROVIDED, HOWEVER, that from and after such time as any Person becomes an

32.

Acquiring Person, this Agreement shall not be amended in any manner which would
adversely affect the interests of the holders of Rights. Without limiting the
foregoing, the Company may at any time prior to such time as any Person becomes
an Acquiring Person amend this Agreement to lower the thresholds set forth in
Sections 1(a) and 3(a) hereof from 20% to any percentage which is (i) greater
than the largest percentage of the outstanding Common Shares then known by the
Company to be beneficially owned by any Person (other than the Company, any
Subsidiary of the Company, any employee benefit plan of the Company or any
Subsidiary, or any entity holding Common Shares for or pursuant to the terms of
any such plan) and (ii) not less than 10%. Upon delivery of a certificate from
an appropriate officer of the Company which states that the proposed supplement
or amendment is in compliance with the terms of this Section 27, the Rights
Agent shall execute such supplement or amendment unless the Rights Agent shall
have determined in good faith that such supplement or amendment would adversely
affect its interest under this Agreement. Prior to the Distribution Date, the
interests of the holders of Rights shall be deemed coincident with the interests
of the holders of Common Shares.

SECTION 28. DETERMINATION AND ACTIONS BY THE BOARD OF DIRECTORS, ETC. For
all purposes of this Agreement, any calculation of the number of Common Shares
outstanding at any particular time, including for purposes of determining the
particular percentage of such outstanding Common Shares or any other securities
of which any Person is the Beneficial Owner, shall be made in accordance with
the last sentence of Rule 13d-3(d)(1)(i) of the General Rules and Regulations
under the Exchange Act as in effect on the date of this Agreement. The Board of
Directors of the Company shall have the exclusive power and authority to
administer this Agreement and to exercise all rights and powers specifically
granted to the Board, or the Company, or as may be necessary or advisable in the
administration of this Agreement, including without limitation, the right and
power to (i) interpret the provisions of this Agreement, and (ii) make all
determinations deemed necessary or advisable for the administration of this
Agreement (including a determination to redeem or not redeem the Rights or to
amend the Agreement). All such actions, calculations, interpretations and
determinations (including, for purposes of clause (y) below, all omissions with
respect to the foregoing) which are done or made by the Board in good faith,
shall (x) be final, conclusive and binding on the Rights Agent and the holders
of the Right Certificates, and (y) not subject the Board to any liability to the
holders of the Right Certificates.

SECTION 29. SUCCESSORS. All the covenants and provisions of this Agreement
by or for the benefit of the Company or the Rights Agent shall bind and inure to
the benefit of their respective successors and assigns hereunder.

SECTION 30. BENEFITS OF THIS AGREEMENT. Nothing in this Agreement shall be
construed to give to any person or corporation other than the Company, the
Rights Agent and the registered holders of the Right Certificates (and, prior to
the Distribution Date, the Common Shares) any legal or equitable right, remedy
or claim under this Agreement; but this Agreement shall be for the sole and
exclusive benefit of the Company, the Rights Agent and the registered holders of
the Right Certificates (and, prior to the Distribution Date, the Common Shares).

33.

SECTION 31. SEVERABILITY. If any term, provision, covenant or restriction
of this Agreement is held by a court of competent jurisdiction or other
authority to be invalid, void or unenforceable, the remainder of the terms,
provisions, covenants and restrictions of this Agreement shall remain in full
force and effect and shall in no way be affected, impaired or invalidated.

SECTION 32. GOVERNING LAW. This Agreement and each Right Certificate issued
hereunder shall be deemed to be a contract made under the laws of the State of
Delaware and for all purposes shall be governed by and construed in accordance
with the laws of such State applicable to contracts to be made and performed
entirely within such State.

SECTION 33. COUNTERPARTS. This Agreement may be executed in any number of
counterparts and each of such counterparts shall for all purposes be deemed to
be an original, and all such counterparts shall together constitute but one and
the same instrument.

SECTION 34. DESCRIPTIVE HEADINGS. Descriptive headings of the several
Sections of this Agreement are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.

34.

IN WITNESS WHEREOF, parties whereto have caused this Agreement to be duly
executed and their seals attested, all as of the day and year first above
written.

ATTEST: NPS PHARMACEUTICALS, INC.

/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇ /s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇
--------------------------------- -------------------------------------
▇▇▇▇▇ ▇. ▇▇▇▇▇▇, ▇.▇. ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, Ph.D.
Vice President, Corporate Chief Executive Officer, President
Development and Legal Affairs,
Secretary and Director

ATTEST: AMERICAN SECURITIES TRANSFER
& TRUST, INC.

By: /s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇▇ By: /s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇
------------------------------ ----------------------------------

Title: Notary Public, Title: Senior V.P.
State of Colorado
-------------------------- ------------------------------

MY COMMISSION EXPIRES: June 30, 2000

[SEAL]

35.

EXHIBIT A

FORM OF

CERTIFICATE OF DESIGNATION

SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

NPS PHARMACEUTICALS, INC.

(Pursuant to Section 151 of the
Delaware General Corporation Law)

NPS PHARMACEUTICALS, INC., a corporation organized and existing under the
General Corporation Law of the State of Delaware (hereinafter called the
"Company"), hereby certifies that the following resolution was adopted by the
Board of Directors of the Corporation as required by Section 151 of the General
Corporation Law at a meeting duly called and held on December 4, 1996:

RESOLVED, that pursuant to the authority granted to and vested in the
Board of Directors of the Company in accordance with the provisions of its
Certificate of Incorporation, the Board of Directors hereby creates a
series of Preferred Stock, par value $.001 per share, of the Company and
hereby states the designation and number of shares, and fixes the relative
designations and the powers, preferences and rights, and the
qualifications, limitations and restrictions thereof (in addition to the
provisions set forth in the Certificate of Incorporation of the Company,
which are applicable to the Preferred Stock of all classes and series), as
follows:

Series A Junior Participating Preferred Stock:

SECTION 1. DESIGNATION AND AMOUNT. Two Hundred Thousand (200,000)
shares of Preferred Stock, $.001 par value, are designated "Series A
Junior Participating Preferred Stock" with the designations and the
powers, preferences and rights, and the qualifications, limitations and
restrictions specified herein (the "Junior Preferred Stock"). Such number
of shares may be increased or decreased

by resolution of the Board of Directors; PROVIDED, that no decrease shall
reduce the number of shares of Junior Preferred Stock to a number less than
the number of shares then outstanding plus the number of shares reserved
for issuance upon the exercise of outstanding options, rights or warrants
or upon the conversion of any outstanding securities issued by the Company
convertible into Junior Preferred Stock.

SECTION 2. DIVIDENDS AND DISTRIBUTIONS.

(A) Subject to the rights of the holders of any shares of any series
of Preferred Stock (or any similar stock) ranking prior and superior to
the Junior Preferred Stock with respect to dividends, the holders of
shares of Junior Preferred Stock, in preference to the holders of Common
Stock, par value $.001 per share (the "Common Stock"), of the Company, and
of any other junior stock, shall be entitled to receive, when, as and if
declared by the Board of Directors out of funds legally available for the
purpose, quarterly dividends payable in cash on the first day of April,
July, October and January in each year (each such date being referred to
herein as a "Quarterly Dividend Payment Date"), commencing on the first
Quarterly Dividend Payment Date after the first issuance of a share or
fraction of a share of Junior Preferred Stock, in an amount per share
(rounded to the nearest cent) equal to the greater of (a) $l.00 or (b)
subject to the provision for adjustment hereinafter set forth, 100 times
the aggregate per share amount of all cash dividends, and 100 times the
aggregate per share amount (payable in kind) of all non-cash dividends or
other distributions, other than a dividend payable in shares of Common
Stock or a subdivision of the outstanding shares of Common Stock (by
reclassification or otherwise) declared on the Common Stock since the
immediately preceding Quarterly Dividend Payment Date or, with respect to
the first Quarterly Dividend Payment Date, since the first issuance of any
share or fraction of a share of Junior Preferred Stock. In the event the
Company shall at any time declare or pay any dividend on the Common Stock
payable in shares of Common Stock, or effect a subdivision or combination
or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of
Common Stock) into a greater or lesser number of shares of Common Stock,
then in each such case the amount to which holders of shares of Junior
Preferred Stock were entitled immediately prior to such event under clause
(b) of the preceding sentence shall be adjusted by multiplying such amount
by a fraction, the numerator of which is the number of shares of Common
Stock outstanding immediately after such event and the denominator of
which is the number of shares of Common Stock that were outstanding
immediately prior to such event.

(B) The Company shall declare a dividend or distribution on the
Junior Preferred Stock as provided in paragraph (A) of this Section
immediately after it declares a dividend or distribution on the Common
Stock (other than a dividend payable in shares of Common Stock); provided
that, in the event no dividend or distribution shall have been declared on
the Common Stock during the period

A-2

between any Quarterly Dividend Payment Date and the next subsequent
Quarterly Dividend Payment Date, a dividend of $1.00 per share on the
Junior Preferred Stock shall nevertheless be payable on such subsequent
Quarterly Dividend Payment Date.

(C) Dividends shall begin to accrue and be cumulative on outstanding
shares of Junior Preferred Stock from the Quarterly Dividend Payment Date
next preceding the date of issue of such shares, unless the date of issue
of such shares is prior to the record date for the first Quarterly
Dividend Payment Date, in which case dividends on such shares shall begin
to accrue from the date of issue of such shares, or unless the date of
issue is a Quarterly Dividend Payment Date or is a date after the record
date for the determination of holders of shares of Junior Preferred Stock
entitled to receive a quarterly dividend and before such Quarterly
Dividend Payment Date, in either of which events such dividends shall
begin to accrue and be cumulative from such Quarterly Dividend Payment
Date. Accrued but unpaid dividends shall not bear interest. Dividends
paid on the shares of Junior Preferred Stock in an amount less than the
total amount of such dividends at the time accrued and payable on such
shares shall be allocated pro rata on a share-by-share basis among all
such shares at the time outstanding. The Board of Directors may fix a
record date for the determination of holders of shares of Junior Preferred
Stock entitled to receive payment of a dividend or distribution declared
thereon, which record date shall be not more than 60 days prior to the
date fixed for the payment thereof.

SECTION 3. VOTING RIGHTS. The holders of shares of Junior
Preferred Stock shall have the following voting rights:

(A) Subject to the provision for adjustment hereinafter set forth,
each share of Junior Preferred Stock shall entitle the holder thereof to
100 votes on all matters submitted to a vote of the stockholders of the
Company. In the event the Company shall at any time declare or pay any
dividend on the Common Stock payable in shares of Common Stock, or effect
a subdivision or combination or consolidation of the outstanding shares of
Common Stock (by reclassification or otherwise than by payment of a
dividend in shares of Common Stock) into a greater or lesser number of
shares of Common Stock, then in each such case the number of votes per
share to which holders of shares of Junior Preferred Stock were entitled
immediately prior to such event shall be adjusted by multiplying such
number by a fraction, the numerator of which is the number of shares of
Common Stock outstanding immediately after such event and the denominator
of which is the number of shares of Common Stock that were outstanding
immediately prior to such event.

(B) Except as otherwise provided herein, in any other Certificate of
Designation creating a series of Preferred Stock or any similar stock, or
by law, the holders of shares of Junior Preferred Stock and the holders of
shares of Common Stock and any other capital stock of the Company having
general voting

A-3

rights shall vote together as one class on all matters submitted to a vote
of stockholders of the Company.

(C) Except as set forth herein, or as otherwise provided by law,
holders of Junior Preferred Stock shall have no special voting rights and
their consent shall not be required (except to the extent they are
entitled to vote with holders of Common Stock as set forth herein) for
taking any corporate action.

SECTION 4. CERTAIN RESTRICTIONS.

(A) Whenever quarterly dividends or other dividends or distributions
payable on the Junior Preferred Stock as provided in Section 2 are in
arrears, thereafter and until all accrued and unpaid dividends and
distributions, whether or not declared, on shares of Junior Preferred
Stock outstanding shall have been paid in full, the Company shall not:

(i) declare or pay dividends, or make any other distributions,
on any shares of stock ranking junior (either as to dividends or upon
liquidation, dissolution or winding up) to the Junior Preferred Stock;

(ii) declare or pay dividends, or make any other distributions,
on any shares of stock ranking on a parity (either as to dividends or upon
liquidation, dissolution or winding up) with the Junior Preferred Stock,
except dividends paid ratably on the Junior Preferred Stock and all such
parity stock on which dividends are payable or in arrears in proportion to
the total amounts to which the holders of all such shares are then
entitled;

(iii) redeem or purchase or otherwise acquire for
consideration shares of any stock ranking junior (either as to dividends
or upon liquidation, dissolution or winding up) to the Junior Preferred
Stock, provided that the Company may at any time redeem, purchase or
otherwise acquire shares of any such junior stock in exchange for shares
of any stock of the Company ranking junior (either as to dividends or upon
dissolution, liquidation or winding up) to the Junior Preferred Stock; or

(iv) redeem or purchase or otherwise acquire for consideration
any shares of Junior Preferred Stock, or any shares of stock ranking on a
parity with the Junior Preferred Stock, except in accordance with a
purchase offer made in writing or by publication (as determined by the
Board of Directors) to all holders of such shares upon such terms as the
Board of Directors, after consideration of the respective annual dividend
rates and other relative rights and preferences of the respective series
and classes, shall determine in good faith will result in fair and
equitable treatment among the respective series or classes.

(B) The Company shall not permit any subsidiary of the Company to
purchase or otherwise acquire for consideration any shares of stock of the

A-4

Company unless the Company could, under paragraph (A) of this Section 4,
purchase or otherwise acquire such shares at such time and in such manner.

SECTION 5. REACQUIRED SHARES. Any shares of Junior Preferred Stock
purchased or otherwise acquired by the Company in any manner whatsoever
shall be retired and cancelled promptly after the acquisition thereof.
All such shares shall upon their cancellation become authorized but
unissued shares of Preferred Stock and may be reissued as part of a new
series of Preferred Stock subject to the conditions and restrictions on
issuance set forth herein, in the Restated Certificate of Incorporation,
or in any other Certificate of Designation creating a series of Preferred
Stock or any similar stock or as otherwise required by law.

SECTION 6. LIQUIDATION, DISSOLUTION OR WINDING UP. Upon any
liquidation, dissolution or winding up of the Company, no distribution
shall be made (1) to the holders of shares of stock ranking junior (either
as to dividends or upon liquidation, dissolution or winding up) to the
Junior Preferred Stock unless, prior thereto, the holders of shares of
Junior Preferred Stock shall have received $100 per share, plus an amount
equal to accrued and unpaid dividends and distributions thereon, whether
or not declared, to the date of such payment, provided that the holders of
shares of Junior Preferred Stock shall be entitled to receive an aggregate
amount per share, subject to the provision for adjustment hereinafter set
forth, equal to 100 times the aggregate amount to be distributed per share
to holders of shares of Common Stock, or (2) to the holders of shares of
stock ranking on a parity (either as to dividends or upon liquidation,
dissolution or winding up) with the Junior Preferred Stock, except
distributions made ratably on the Junior Preferred Stock and all such
parity stock in proportion to the total amounts to which the holders of
all such shares are entitled upon such liquidation, dissolution or winding
up. In the event the Company shall at any time declare or pay any
dividend on the Common Stock payable in shares of Common Stock, or effect
a subdivision or combination or consolidation of the outstanding shares of
Common Stock (by reclassification or otherwise than by payment of a
dividend in shares of Common Stock) into a greater or lesser number of
shares of Common Stock, then in each such case the aggregate amount to
which holders of shares of Junior Preferred Stock were entitled
immediately prior to such event under the proviso in clause (1) of the
preceding sentence shall be adjusted by multiplying such amount by a
fraction the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is
the number of shares of Common Stock that were outstanding immediately
prior to such event.

SECTION 7. CONSOLIDATION, MERGER, ETC. In case the Company shall
enter into any consolidation, merger, combination or other transaction in
which the shares of Common Stock are exchanged for or changed into other
stock or securities, cash and/or any other property, then in any such case
each share of Junior Preferred Stock shall at the same time be similarly
exchanged or changed into an amount per share, subject to the provision
for adjustment hereinafter set

A-5

forth, equal to 100 times the aggregate amount of stock, securities, cash
and/or any other property (payable in kind), as the case may be, into which
or for which each share of Common Stock is changed or exchanged. In the
event the Company shall at any time declare or pay any dividend on the
Common Stock payable in shares of Common Stock, or effect a subdivision or
combination or consolidation of the outstanding shares of Common Stock (by
reclassification or otherwise than by payment of a dividend in shares of
Common Stock) into a greater or lesser number of shares of Common Stock,
then in each such case the amount set forth in the preceding sentence with
respect to the exchange or change of shares of Junior Preferred Stock shall
be adjusted by multiplying such amount by a fraction, the numerator of
which is the number of shares of Common Stock outstanding immediately after
such event and the denominator of which is the number of shares of Common
Stock that were outstanding immediately prior to such event.

SECTION 8. NO REDEMPTION. The shares of Junior Preferred Stock
shall not be redeemable.

SECTION 9. RANK. The Junior Preferred Stock shall rank, with
respect to the payment of dividends and the distribution of assets, junior
to all series of any other class of the Company's Preferred Stock.

SECTION 10. AMENDMENT. The Restated Certificate of Incorporation of
the Company shall not be amended in any manner which would materially
alter or change the powers, preferences or special rights of the Junior
Preferred Stock so as to affect them adversely without the affirmative
vote of the holders of at least two-thirds of the outstanding shares of
Junior Preferred Stock, voting together as a single class.

IN WITNESS WHEREOF, the undersigned have executed this certificate as of
December 16, 1996.

/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇
---------------------------------------------
▇▇▇▇▇▇ ▇▇▇▇▇▇▇, PH.D.
Chief Executive Officer, President

/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇
---------------------------------------------
▇▇▇▇▇ ▇. ▇▇▇▇▇▇, ▇.▇.
Vice President, Corporate Development and
Legal Affairs, Secretary and Director

A-6

EXHIBIT B

FORM OF RIGHT CERTIFICATE

CERTIFICATE NO. R- _____ RIGHTS

NOT EXERCISABLE AFTER DECEMBER 31, 2001 OR EARLIER IF REDEMPTION OR
EXCHANGE OCCURS. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.01 PER RIGHT
AND TO EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT.

RIGHT CERTIFICATE

NPS PHARMACEUTICALS, INC.

This certifies that ___________________ or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement, dated as of December 4, 1996 (the "Rights Agreement"), between NPS
Pharmaceuticals, Inc., a Delaware corporation (the "Company"), and AMERICAN
SECURITIES TRANSFER & TRUST, INC. (the "Rights Agent"), to purchase from the
Company at any time after the Distribution Date (as such term is defined in the
Rights Agreement) and prior to 5:00 P.M., Mountain Standard Time, on December
31, 2001 at the office of the Rights Agent designated for such purpose, or at
the office of its successor as Rights Agent, one one-hundredth of a fully paid
non-assessable share of Series A Junior Participating Preferred Stock, par value
$.001 per share (the "Preferred Shares"), of the Company, at a purchase price of
$50.00 per one one-hundredth of a Preferred Share (the "Purchase Price"), upon
presentation and surrender of this Right Certificate with the Form of Election
to Purchase duly executed. The number of Rights evidenced by this Right
Certificate (and the number of one one-hundredths of a Preferred Share which may
be purchased upon exercise hereof) set forth above, and the Purchase Price set
forth above, are the number and Purchase Price as of December 4, 1996 based on
the Preferred Shares as constituted at such date.

From and after the time any Person becomes an Acquiring Person, (as such
terms are defined in the Rights Agreement), if the Rights evidenced by this
Right Certificate are beneficially owned by (i) an Acquiring Person or an
Affiliate or Associate of any such Acquiring Person (as such terms are defined
in the Rights Agreement), (ii) a transferee of any such Acquiring Person,
Associate or Affiliate who becomes a transferee after the Acquiring Person
becomes such, or (iii) under certain circumstances specified in the Rights
Agreement, a transferee of any such Acquiring Person, Associate or Affiliate who
becomes a transferee prior to or concurrently with the Acquiring Person becoming
such, such Rights shall become null and

B-1

void and no holder hereof shall have any right with respect to such Rights
from and after the time any Person becomes an Acquiring Person.

As provided in the Rights Agreement, the Purchase Price and the number of one
one-hundredths of a Preferred Share which may be purchased upon the exercise of
the Rights evidenced by this Right Certificate are subject to modification and
adjustment upon the happening of certain events.

This Right Certificate is subject to all of the terms, provisions and
conditions of the Rights Agreement, as amended from time to time, which terms,
provisions and conditions are hereby incorporated herein by reference and made a
part hereof and to which Rights Agreement reference is hereby made for a full
description of the rights, limitations of rights, obligations, duties and
immunities hereunder of the Rights Agent, the Company and the holders of the
Right Certificates. Copies of the Rights Agreement are on file at the principal
executive offices of the Company and the above-mentioned offices of the Rights
Agent.

This Right Certificate, with or without other Right Certificates, upon
surrender at the office of the Rights Agent designated for such purpose, may be
exchanged for another Right Certificate or Right Certificates of like tenor and
date evidencing Rights entitling the holder to purchase a like aggregate number
of Preferred Shares as the Rights evidenced by the Right Certificate or Right
Certificates surrendered shall have entitled such holder to purchase. If this
Right Certificate shall be exercised in part, the holder shall be entitled to
receive upon surrender hereof another Right Certificate or Right Certificates
for the number of whole Rights not exercised.

Subject to the provisions of the Rights Agreement, the Rights evidenced by
this Certificate (i) may be redeemed by the Company at a redemption price of
$.01 per Right or (ii) may be exchanged in whole or in part for shares of the
Company's Common Stock or Preferred Shares, par value $.001 per share.

No fractional Preferred Shares will be issued upon the exercise of any Right
or Rights evidenced hereby (other than fractions which are integral multiples of
one one-hundredth of a Preferred Share, which may, at the election of the
Company, be evidenced by depositary receipts) but in lieu thereof a cash payment
will be made, as provided in the Rights Agreement.

No holder of this Right Certificate shall be entitled to vote or receive
dividends or be deemed for any purpose the holder of the Preferred Shares or of
any other securities of the Company which may at any time be issuable on the
exercise hereof, nor shall anything contained in the Rights Agreement or herein
be construed to confer upon the holder hereof, as such, any of the rights of a
stockholder of the Company or any right to vote for the election of directors or
upon any matter submitted to stockholders at any meeting thereof, or to give or
withhold consent to any corporate action, or to receive notice of meetings or
other actions affecting stockholders (except as provided in the Rights
Agreement), or to receive dividends or subscription rights, or otherwise, until
the Right or Rights evidenced by this Right Certificate shall have been
exercised as provided in the Rights Agreement.

B-2

This Right Certificate shall not be valid or obligatory for any purpose until
it shall have been countersigned by the Rights Agent.

WITNESS the facsimile signature of the proper officers of the Company and its
corporate seal. Dated as of __________.

ATTEST: NPS PHARMACEUTICALS, INC.

------------------------------------- ------------------------------------
▇▇▇▇▇ ▇. ▇▇▇▇▇▇, ▇.▇. ▇▇▇▇▇▇ ▇▇▇▇▇▇▇, Ph.D.
Vice President, Corporate Development Chief Executive Officer, President
and Legal Affairs, Secretary
and Director

COUNTERSIGNED:

AMERICAN SECURITIES TRANSFER INCORPORATED
as Rights Agent

By:
---------------------------------
Authorized Signature

B-3

Form of Reverse Side of Right Certificate

FORM OF ASSIGNMENT

(To be executed by the registered holder if such
holder desires to transfer the Right Certificate.)

FOR VALUE RECEIVED ______________________________________ hereby sells,
assigns and transfers unto

______________________________________________________________
(Please print name and address of transferee)

______________________________________________________________ this Right
Certificate, together with all right, title and interest therein, and does
hereby irrevocably constitute and appoint ________________________ Attorney, to
transfer the within Right Certificate on the books of the within-named Company,
with full power of substitution.

Dated: ____________________

________________________________
Signature

Form of Reverse Side of Right Certificate -- continued

B-4

Signature Guaranteed:

Signatures must be guaranteed by an "eligible guarantor institution" as
defined in Rule 17Ad-15 promulgated under the Securities Exchange Act of 1934,
as amended.

---------------------------------------------------------------

The undersigned hereby certifies that (1) the Rights evidenced by this Right
Certificate are not being sold, assigned or transferred by or on behalf of a
Person who is or was an Acquiring Person, an Interested Stockholder or an
Affiliate or Associate thereof (as defined in the Rights Agreement); and
(2) after due inquiry and to the best of the knowledge of the undersigned, the
undersigned did not acquire the Rights evidenced by this Right Certificate from
any Person who is or was an Acquiring Person, an Interested Stockholder, or an
Affiliate or Associate thereof (as such terms are defined in the Rights
Agreement).

________________________________
Signature

B-5

FORM OF ELECTION TO PURCHASE

(To be executed if holder desires to exercise
Rights represented by the Right Certificate.)

TO NPS PHARMACEUTICALS, INC.

The undersigned hereby irrevocably elects to exercise
___________________________ Rights represented by this Right Certificate to
purchase the Preferred Shares issuable upon the exercise of such Rights and
requests that certificates for such Preferred Shares be issued in the name of:

Please insert social security
or other identifying number: ______________

______________________________________________________________
(Please print name and address)

______________________________________________________________

If such number of Rights shall not be all the Rights evidenced by this Right
Certificate, a new Right Certificate for the balance remaining of such Rights
shall be registered in the name of and delivered to:

Please insert social security
or other identifying number: ______________

______________________________________________________________
(Please print name and address)

______________________________________________________________

Dated: _________________

________________________________
Signature

Form of Reverse Side of Right Certificate -- continued
Signature Guaranteed:

B-6

Signatures must be guaranteed by an "eligible guarantor institution" as
defined in Rule 17Ad-15 promulgated under the Securities Exchange Act of 1934,
as amended.

---------------------------------------------------------------

The undersigned hereby certifies that the Rights evidenced by this Right
Certificate are not being beneficially owned by nor are they being exercised on
behalf of (1) an Acquiring Person, an Interested Stockholder or an Affiliate or
Associate thereof (as defined in the Rights Agreement); and (2) after due
inquiry and to the best of the knowledge of the undersigned, the undersigned did
not acquire the Rights evidenced by this Right Certificate from any Person who
is or was an Acquiring Person, an Interested Stockholder, or an Affiliate or
Associate thereof (as such terms are defined in the Rights Agreement).

________________________________
Signature

---------------------------------------------------------------

NOTICE

The signature in the Form of Assignment or Form of Election to Purchase, as
the case may be, must conform to the name as written upon the face of this Right
Certificate in every particular, without alteration or enlargement or any change
whatsoever.

In the event the certification set forth above in the Form of Assignment or
the Form of Election to Purchase, as the case may be, is not completed, the
Company and the Rights Agent will deem the beneficial owner of the Rights
evidenced by this Right Certificate to be an Acquiring Person or an Affiliate or
Associate thereof (as defined in the Rights Agreement) and such Assignment or
Election to Purchase will not be honored.

B-7

EXHIBIT C

NPS PHARMACEUTICALS, INC.

SUMMARY OF RIGHTS TO PURCHASE SHARES
OF PREFERRED STOCK

On December 4, 1996, the Board of Directors of NPS PHARMACEUTICALS, INC. (the
"Company") declared a dividend of one preferred share purchase right (a "Right")
for each outstanding share of common stock, par value $.001 per share (the
"Common Shares"), of the Company. The dividend is effective as of December 31,
1996 (the "Record Date") with respect to the stockholders of record on that
date. The Rights will also attach to new Common Shares issued after the Record
Date. Each Right entitles the registered holder to purchase from the Company
one one-hundredth of a share of Series A Junior Participating Preferred Stock,
par value $.001 per share (the "Junior Preferred Shares"), of the Company at a
price of $50.00 per one one-hundredth of a Preferred Share (the "Purchase
Price"), subject to adjustment. Each Preferred Share is designed to be the
economic equivalent of 100 Common Shares. The description and terms of the
Rights are set forth in a Rights Agreement dated as of December 4, 1996 (the
"Rights Agreement"), between the Company and American Securities Transfer &
Trust, Inc. (the "Rights Agent").

DETACHMENT AND TRANSFER OF RIGHTS

Initially, the Rights will be evidenced by the stock certificates
representing Common Shares then outstanding, and no separate Right Certificates
will be distributed. Until the earlier to occur of (i) a public announcement
that a person or group of affiliated or associated persons, has become an
"Acquiring Person" (as such term is defined in the Rights Agreement), has
acquired beneficial ownership of 20% or more of the outstanding Common Shares or
(ii) 10 business days following the commencement of, or announcement of an
intention to make, a tender offer or exchange offer which would result in the
beneficial ownership by an Acquiring Person of 20% or more of the outstanding
Common Shares (the earlier of such dates being called the "Distribution Date"),
the Rights will be evidenced, with respect to any of the Common Share
certificates outstanding as of the Record Date, by such Common Share certificate
with a copy of this Summary of Rights attached thereto.

The Rights Agreement provides that, until the Distribution Date (or earlier
redemption or expiration of the Rights), the Rights will be transferred with and
only and always with the Common Shares. Until the Distribution Date (or earlier
redemption or expiration of the Rights), new Common Share certificates issued
after the Record Date upon transfer or new issuance of Common Shares will
contain a notation incorporating the Rights Agreement by reference. Until the
Distribution Date (or earlier redemption or expiration of the Rights) the
surrender or transfer of any certificates for Common Shares outstanding as of
the Record Date, even without such notation or a copy of this Summary of Rights
being attached thereto, will also constitute the transfer of the Rights
associated with the Common Shares, represented by such certificate. As soon as
practicable following the Distribution Date, separate certificates evidencing
the Rights

C-1

("Right Certificates") will be mailed to holders of record of the Common
Shares as of the close of business on the Distribution Date and such separate
Right Certificates alone will evidence the Rights.

EXERCISABILITY OF RIGHTS

The Rights are not exercisable until the Distribution Date. The Rights will
expire on December 31, 2001 (the "Final Expiration Date"), unless the Final
Expiration Date is extended or unless the Rights are earlier redeemed or
exchanged by the Company, in each case as described below. Until a Right is
exercised, the holder thereof, as such, will have no rights as a stockholder of
the Company, including, without limitation, the right to vote or to receive
dividends.

The Purchase Price payable, and the number of Junior Preferred Shares or
other securities or property issuable, upon exercise of the Rights are subject
to adjustment from time to time to prevent dilution. The number of outstanding
Rights and the number of one one-hundredths of a Preferred Share issuable upon
exercise of each Right are also subject to adjustment in the event of a stock
split of the Common Shares or a stock dividend on the Common Shares payable in
Common Shares, or subdivisions, consolidations or combinations of the Common
Shares occurring, in any such case, prior to the Distribution Date. With
certain exceptions, no adjustment in the Purchase Price will be required until
cumulative adjustments require an adjustment of at least 1% in such Purchase
Price. No fractional Junior Preferred Shares will be issued (other than
fractions which are integral multiples of one one-hundredth of a Preferred
Share, which may, at the election of the Company, be evidenced by depositary
receipts) and in lieu thereof, an adjustment in cash will be made based on the
market price of the Junior Preferred Shares on the last trading day prior to the
date of exercise.

TERMS OF JUNIOR PREFERRED SHARES

Junior Preferred Shares purchasable upon exercise of the Rights will not be
redeemable. Each Preferred Share will be entitled to a minimum preferential
quarterly dividend payment of $l per share but will be entitled to an aggregate
dividend of 100 times the dividend declared per Common Share. In the event of
liquidation, the holders of the Junior Preferred Shares will be entitled to a
minimum preferential liquidation payment of $100 per share but will be entitled
to an aggregate payment of 100 times the payment made per Common Share. Each
Preferred Share will have 100 votes, voting together with the Common Shares.
Finally, in the event of any merger, consolidation or other transaction in which
Common Shares are exchanged, each Preferred Share will be entitled to receive
100 times the amount received per Common Share. These rights are protected by
customary anti-dilution provisions. Because of the nature of the Junior
Preferred Shares' dividend, liquidation and voting rights, the value of the one
one-hundredth interest in a Preferred Share purchasable upon exercise of each
Right should approximate the value of one Common Share. The Junior Preferred
Shares would rank junior to any other series of the Company's preferred stock.

C-2

TRIGGER OF FLIP-IN AND FLIP-OVER RIGHTS

In the event that any person or group of affiliated or associated persons
becomes an Acquiring Person, proper provision shall be made so that each holder
of a Right, other than Rights beneficially owned by the Acquiring Person (which
will thereafter be void), will thereafter have the right to receive upon
exercise that number of Common Shares having a market value of two times the
exercise price of the Right.

In the event that the Company is acquired in a merger or other business
combination transaction or 50% or more of its consolidated assets or earning
power are sold, proper provision will be made so that each holder of a Right
will thereafter have the right to receive, upon the exercise thereof at the then
current exercise price of the Right, that number of shares of common stock of
the acquiring company which at the time of such transaction will have a market
value of two times the exercise price of the Right.

REDEMPTION AND EXCHANGE OF RIGHTS

At any time prior to the earlier of (i) the close of business on the day of
the first public announcement that a person has become an Acquiring Person, or
(ii) the Final Expiration Date, the Board of Directors of the Company may redeem
the Rights in whole, but not in part, at a price of $.01 per Right (the
"Redemption Price"). The redemption of the Rights may be made effective at such
time on such basis with such conditions as the Board of Directors in its sole
discretion may establish. Immediately upon any redemption of the Rights, the
right to exercise the Rights will terminate and the only right of the holders of
Rights will be to receive the Redemption Price. Additionally, after the time
that a person becomes an Acquiring Person, the Company may redeem the then
outstanding Rights in whole, but not in part, at the Redemption Price PROVIDED,
that such redemption is in connection with a merger or other business
combination, transaction or series of transactions involving the Company in
which all holders of Common Share are treated alike and not involving an
Acquiring Person or its affiliates or associates.

At any time after any Person becomes an Acquiring Person and prior to the
acquisition by such person or group of 50% or more of the outstanding Common
Shares, the Board of Directors of the Company may exchange the Rights (other
than Rights owned by such person or group which will have become void), in whole
or in part, at an exchange ratio of one Common Share, or one one-hundredth of a
Preferred Share (or of a share of a class or series of the Company's preferred
stock having equivalent designations and the powers, preferences and rights, and
the qualifications, limitations and restrictions), per Right (subject to
adjustment).

C-3

AMENDMENT OF RIGHTS

The terms of the Rights may be amended by the Board of Directors of the
Company without the consent of the holders of the Rights, including an amendment
(a) to lower certain thresholds described above to any percentage which is
(i) greater than the largest percentage of the outstanding Common Shares then
known to the Company to be beneficially owned by any person or group of
affiliated or associated persons (other than the Company, any Subsidiary of the
Company, employee benefit plans of any Company or any Subsidiary, or any entity
holding Common Shares pursuant to the terms of any such plan) and (ii) not less
than 10% or (b) increase the Purchase Price for each Right, except that from and
after such time as any person or group of affiliated or associated persons
becomes an Acquiring Person no such amendment may adversely affect the interests
of the holders of the Rights.

ADDITIONAL INFORMATION

A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Current Report on Form 8-K dated December
__, 1996. A copy of the Rights Agreement is available from the Company by
writing to: Investor Relations, NPS PHARMACEUTICALS, INC., ▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇,
▇▇▇▇ ▇▇▇▇ ▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇-▇▇▇▇. This summary description of the Rights is not
intended to be complete and is qualified in its entirety by reference to the
Rights Agreement, which is hereby incorporated herein by reference.

C-4

EXHIBIT 4.1 RIGHTS AGREEMENT BETWEEN AMERICAN STOCK TRANSFER & TRUST, INC. AND NPS PHARMACEUTICALS, INC. DATED DECEMBER 4, 1996

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