[***CONFIDENTIAL TREATMENT REQUESTED. CONFIDENTIAL PORTIONS OF THIS AGREEMENT
     HAVE BEEN REDACTED AND HAVE BEEN SEPARATELY FILED WITH THE COMMISION]
                             CROSS-LICENSE AGREEMENT
         This Agreement (the "Agreement") is entered into as of October 14, 2002
(the "Execution  Date") by and between Wyeth  (formerly,  American Home Products
Corporation)  by and  through  Genetics  Institute,  L.L.C.  (formerly  Genetics
Institute,  Inc.), a Delaware limited  liability company with a business address
at  ▇▇  ▇▇▇▇▇▇▇▇▇▇▇▇▇   ▇▇▇▇▇,   ▇▇▇▇▇▇▇▇▇,   ▇▇▇▇▇▇▇▇▇▇▇▇▇   ▇▇▇▇▇  ("GI")  and
MetaMorphix,  Inc.,  a Delaware  corporation  with a  business  address at ▇▇▇▇▇
▇▇▇▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇▇,  ▇▇▇▇▇▇▇▇ ▇▇▇▇▇  ("MetaMorphix").  GI and MetaMorphix may
each be referred to herein  individually  as a "Party" and  collectively  as the
"Parties".
         WHEREAS,  as of December 1, 1994, GI, MetaMorphix and The ▇▇▇▇▇ ▇▇▇▇▇▇▇
University ("JHU") entered into that certain Collaboration  Agreement (the "1994
Agreement")  relating to the  discovery,  characterization,  and  development of
factors in the TGF-B Superfamily (referred to by GI as "BMPs" and by MetaMorphix
and JHU as "GDFs,"/as such terms are more fully defined in that Agreement);
         WHEREAS,  as of January 26, 1999, the Parties and JHU entered into that
certain Amended and Restated Collaboration Agreement (as subsequently amended by
the Sponsored  Research  Amendments (as defined  below),  the "1999  Agreement")
relating to the discovery,  characterization,  and development of factors in the
TGF-B  Superfamily  (referred to by GI as "BMPs" and by  MetaMorphix  and JHU as
"GDFs," as such terms are more fully defined in that Agreement), which agreement
supercedes and replaces the 1994 Agreement;
         WHEREAS,  effective as of January 1, 2001, the Parties and JHU executed
and  delivered  that  certain  First  Amendment  to 1999  Amended  and  Restated
Collaboration  Agreement and, effective as of June 30, 2002, the Parties and JHU
executed  and  delivered  that  certain  Second  Amendment  to 1999  Amended and
Restated  Collaboration   Agreement   (collectively,   the  "Sponsored  Research
Amendments")  each  relating  to  Additional  Sponsored  Research at JHU focused
solely upon MetaMorphix Factor GDF-8; and
         WHEREAS,  the  Parties  desire to disclose  and share  freely with each
other Confidential  Information regarding MetaMorphix Factor GDF-8 and to expand
the  present  cross  licenses  (granted  under the 1999  Agreement)  between the
Parties in respect,  only,  to  MetaMorphix  Factor  GDF-8 and all  internal and
external  research  related to such Factor,  including,  but not limited to, the
June 1, 1998 -- December 31, 2000 Sponsored  Research at JHU in accordance  with
Section  3.3 of the  1999  Agreement  and the  postJanuary  1,  2001  Additional
Sponsored Research in accordance with the Sponsored Research Amendments.
         NOW THEREFORE,  in consideration of the foregoing premises,  the mutual
covenants,  agreements,  representations,  and  warranties  set forth herein and
other good and valuable  consideration,  the receipt and sufficiency of which is
hereby acknowledged
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by each of the Parties,  the Parties  hereby  covenant,  agree,  represent,  and
warrant as follows:
1.        DEFINITIONS.
         1.1      EXISTING  DEFINITIONS.  Unless expressly  defined herein,  all
                  capitalized  terms  used  in this  Agreement  shall  have  the
                  meanings  assigned to such terms in the 1999 Agreement and are
                  incorporated  herein by  reference.  For the sake of  clarity,
                  where a capitalized term is defined in both this Agreement and
                  in the  1999  Agreement,  the  definition  set  forth  in this
                  Agreement  shall  control with respect to the use of such term
                  in this  Agreement,  and the  definition set forth in the 1999
                  Agreement  shall  control with respect to the use of such term
                  in the 1999 Agreement.
         1.2      ADDITIONAL DEFINITIONS.  Solely for purposes of this Agreement
                  (it being  understood  and agreed that nothing in this Section
                  1.2 shall be deemed to be an amendment of any provision in the
                  1999 Agreement),  the following  capitalized  terms shall have
                  the respective meanings assigned thereto in this Section 1.2:
         1.2.1    "CONTROL" OR  "CONTROLLED"  shall mean with respect to any (i)
                  item of information,  including, without limitation, any GDF-8
                  KnowHow,  or (ii) intellectual  property right, the possession
                  (whether by purchase, assignment or license) by a Party of the
                  ability to grant to the other Party access and/or a license as
                  provided herein under such item or right without violating the
                  terms of any  agreement or other  arrangements  with any Third
                  Party.
         1.2.2    "EFFECTIVE  DATE" shall mean the next  business day  following
                  the last to occur of: (i) the  delivery to each Party of fully
                  executed counterparts of this Agreement,  (ii) a determination
                  made  by GI  that a  notification  of  this  Agreement  is not
                  required  to  be  made  under  the  HSR  Act,   and  (iii)  if
                  notification  of this  Agreement  is required to be made under
                  the HSR Act,  the  expiration  or earlier  termination  of any
                  notice and waiting period under the HSR Act.
         1.2.3    "EXCLUDED  PRODUCT" shall mean any GI Excluded  Product or any
                  MetaMorphix Excluded Product.
         1.2.4    "GDF-8"  shall mean the  TGF-(3  Factor  known as GDF-8  which
                  Factor  is   designated   under  the  1999   Agreement   as  a
                  "MetaMorphix Factor".
         1.2.5    "GDF-8     DERIVATIVE      PRODUCT"     shall     mean     any
                  pharmaceuticalproduct which primarily acts as
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                  (i)      an  antagonist  or  agonist  of  GDF-8  or the  GDF-8
                           receptor,
                  (ii)     a vaccine against GDF-8,
                  (iii)    a modifier of GDF-8 synthesis, or
                  (iv)     a modulator of the GDF-8 signal transduction pathway,
                  only to the extent  that such  pharmaceutical  product is both
                  (a)  developed  or sold for the  purposes  of  modulating  the
                  effects  of GDF-8,  and (b) is  covered  by one or more  Valid
                  Claims  included  within the  applicable  GDF-8 Patent  Rights
                  licensed under Section 2.1 or Section 2.2 hereof.
         1.2.6    "GDF-8   KNOW-HOW"  shall  mean  any  unpatented   information
                  specifically   relating  to  GDF-8   produced   or   otherwise
                  Controlled  by  either  Party  which  is  reasonably   useful,
                  necessary or required  for the other Party and its  Affiliates
                  to  manufacture,  use and/or sell GDF-8 Licensed  Products for
                  use in the  MetaMorphix  Field or the GI Field, as applicable,
                  under this Agreement.
         1.2.7    "GDF-8 LICENSED PRODUCT" shall mean any GDF-8 Product or GDF-8
                  Derivative  Product, in each case, other than (i) with respect
                  to  the  rights  granted  to  GI  hereunder,  any  MetaMorphix
                  Excluded Product or (ii) with respect to the rights granted to
                  MetaMorphix hereunder, any GI Excluded Product.
         1.2.8    "GDF-8 PATENT RIGHTS" shall mean,  with respect to GDF-8,  any
                  GDF-8 Product, or any GDF-8 Derivative Product (a) all Patents
                  covering  inventions  (as such term is  defined  under  United
                  States  Patent  Law)  which (i) as of the  Effective  Date are
                  Controlled by or during the term of this  Agreement  come into
                  the  Control  of  either   Party,   either  alone  or  jointly
                  (including,  without limitation,  jointly with JHU pursuant to
                  the  1994  Agreement  or the  1999  Agreement)  and  (ii)  are
                  reasonably  useful,  necessary or required for the other Party
                  and its  Affiliates  to  manufacture,  use  and/or  sell GDF-8
                  Licensed  Products for use in the MetaMorphix  Field or the GI
                  Field,  as  applicable,  and (b) all  Patents  coming into the
                  Control of a Party during the term of this  Agreement,  which,
                  but for the  inclusion  of such  acquired  Patents  under this
                  clause (b),  would prevent the other Party and its  Affiliates
                  from  practicing  under  one or more of the  Patents  included
                  under clause (a) above.
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         1.2.9    "GDF-8 PRODUCT" shall mean GDF-8, including any and all
                  (i)      formulations, mixtures or compositions of GDF-8,
                  (ii)     antibodies targeted against GDF-8,
                  (iii)    receptors for which GDF-8 is a ligand,
                  (iv)     antisense molecules or ribozymes that modulate the IN
                           VIVO production of GDF-8, and
                  (v)      other   products   for   research,    diagnostic   or
                           therapeutic  use  containing  GDF-8  or  any  of  (i)
                           through (iv) above,
                  which,  or which  the  manufacture  use or sale of  which,  is
                  covered  by one or  more  Valid  Claims  included  within  the
                  applicable  GDF-8 Patent Rights  licensed under Section 2.1 or
                  Section 2.2 hereof.
         1.2.10   "GI  EXCLUDED  PRODUCT"  shall  mean any GDF-8  Product or any
                  GDF-8 Derivative  Product which GI selects pursuant to Section
                  3.3  hereof.  A list of those GI Excluded  Products  that have
                  been  selected  by GI as of the  Effective  Date  is  attached
                  hereto as Exhibit 1.2.10.
         1.2.11   "GI GDF-8 KNOW-HOW" shall mean that GDF-8 Know-How, other than
                  the Joint GDF-8  Know-How,  which is  Controlled  by GI or its
                  Affiliates as of the Effective  Date or comes into the Control
                  of GI or its Affiliates during the term of this Agreement,  in
                  each  case  other  than  through  the  grant  of  licenses  by
                  MetaMorphix under this Agreement or the 1999 Agreement.
         1.2.12   "GI GDF-8 PATENT RIGHTS" shall mean those GDF-8 Patent Rights,
                  other than the Joint GDF-8 Patent Rights, which are Controlled
                  by GI or its  Affiliates as of the Effective Date or come into
                  the  Control of GI or its  Affiliates  during the term of this
                  Agreement,  in each  case  other  than  through  the  grant of
                  licenses  by  MetaMorphix  under  this  Agreement  or the 1999
                  Agreement.  Without  limitation  of the  foregoing,  a list of
                  those GI GDF-8 Patent Rights believed to be existing as of the
                  Effective Date is attached hereto as Exhibit 1.2.12, PROVIDED,
                  HOWEVER,  that inclusion of any  particular  Patent on Exhibit
                  1.2.12  shall not  serve as an  admission  by either  Party or
                  evidence  that such  Patent  was not  included  in the  rights
                  licensed by GI to MetaMorphix under the 1999 Agreement.
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         1.2.13   "GI GDF-8 TECHNOLOGY" shall mean the GI GDF-8 Know-How, the GI
                  GDF-8  Patent  Rights and GI's  interest  in each of the Joint
                  GDF-8 Know-How and the Joint GDF-8 Patent Rights.
         1.2.14   "HSR  ACT"   shall   mean  the   ▇▇▇▇-▇▇▇▇▇-▇▇▇▇▇▇   Antitrust
                  Improvements  Act of  1976,  as  amended,  and the  rules  and
                  regulations promulgated thereunder.
         1.2.15   "JOINT GDF-8 KNOW-HOW"  shall mean that GDF-8 Know-How,  which
                  (a) as of the  Effective  Date is Controlled by both (i) GI or
                  its Affiliates  and (ii)  MetaMorphix or its Affiliates or (b)
                  during the term of this  Agreement,  comes into the Control of
                  both  (i) GI or its  Affiliates  and (ii)  MetaMorphix  or its
                  Affiliates,  in each  case  other  than  through  the grant of
                  licenses by one Party to the other Party under this  Agreement
                  or the 1999 Agreement.
         1.2.15   "JOINT  GDF-8  PATENT  RIGHTS"  shall mean those GDF-8  Patent
                  Rights,  which (a) as of the  Effective  Date is Controlled by
                  both  (i) GI or its  Affiliates  and (ii)  MetaMorphix  or its
                  Affiliates or (b) during the term of this Agreement, come into
                  the  Control  of  both  (i)  GI or  its  Affiliates  and  (ii)
                  MetaMorphix or its Affiliates, in each case other than through
                  the grant of  licenses  by one Party to the other  Party under
                  this  Agreement or the 1999  Agreement.  A list of those Joint
                  GDF-8  Patent  Rights  existing  as of the  Effective  Date is
                  attached hereto as Exhibit 1.2.15.
         1.2.16   "METAMORPHIX  EXCLUDED.  PRODUCT" shall mean any GDF-8 Product
                  or any GDF-8  Derivative  Product  which  MetaMorphix  selects
                  pursuant to Section 3.3  hereof.  A list of those  MetaMorphix
                  Excluded Products that have been selected by MetaMorphix as of
                  the Effective Date is attached hereto as Exhibit 1.2.16
         1.2.17   "METAMORPHIX  GDF-8  KNOW-HOW" shall mean that GDF-8 Know-How,
                  other than the Joint GDF-8  Know-How,  which is  Controlled by
                  MetaMorphix  or its  Affiliates  as of the  Effective  Date or
                  comes into the Control of MetaMorphix or its Affiliates during
                  the term of this  Agreement,  in each case other than  through
                  the grant of licenses by GI under this  Agreement  or the 1999
                  Agreement.
         1.2.18   "METAMORPHIX  GDF-8  PATENT  RIGHTS"  shall mean  those  GDF-8
                  Patent Rights, other than the Joint GDF-8 Patent Rights, which
                  are  Controlled  by  MetaMorphix  or its  Affiliates as of the
                  Effective  - Date or come into the Control of  MetaMorphix  or
                  its Affiliates during the term of this Agreement, in each case
                  other than through
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                  the grant of licenses by GI under this  Agreement  or the 1999
                  Agreement.  Without  limitation  of the  foregoing,  a list of
                  those  MetaMorphix GDF-8 Patent Rights believed to be existing
                  as of the Effective Date is attached hereto as Exhibit 1.2.18,
                  PROVIDED,  HOWEVER, that inclusion of any particular Patent on
                  Exhibit 1.2.18 shall not serve as an admission by either Party
                  or evidence  that such  Patent was not  included in the rights
                  licensed by MetaMorphix to GI under the 1999 Agreement.
         1.2.19   "METAMORPHIX  GDF-8  TECHNOLOGY"  shall  mean the  MetaMorphix
                  GDF-8  Know-How,  the  MetaMorphix  GDF-8  Patent  Rights  and
                  MetaMorphix's interest in each of the Joint GDF-8 Know-How and
                  the Joint GDF-8 Patent Rights.
         1.2.20   "PRODUCT DEVELOPMENT" with respect to the activities conducted
                  by or on behalf of a Party,  shall mean any and all activities
                  performed,  by or on behalf of such Party,  in connection with
                  the  development  of any  GDF-8  Product  or GDF-8  Derivative
                  Product  from  the  date on  which  such  Party  has  formally
                  determined  (in  such  fashion  as  such   determinations  are
                  customarily  made  with  in  such  Party's   organization)  to
                  undertake those  preclinical  activities  necessary to support
                  the  filing  of an IND (in the  case of GI) or an INAD (in the
                  case of MetaMorphix)  until Regulatory  Approval of such GDF-8
                  Product  or  GDF-8  Derivative  Product  is  obtained  for the
                  indication under study, including, without limitation,  animal
                  toxicology  studies,  formulation  research  and  development,
                  manufacturing  research and development and clinical  studies.
                  When used as a verb in such context,  "Develop"  shall mean to
                  engage in Product Development.
2.        LICENSES AND OPTIONS.
         2.1      LICENSES  GRANTED TO GI. To the extent not granted to GI under
                  the  1999  Agreement,   and  subject  to  (i)  the  terms  and
                  conditions of this  Agreement,  (ii) the reservation of rights
                  set forth in Section 6.6 of the 1999  Agreement  and (iii) any
                  rights retained by the United States  government in accordance
                  with P.L.  96-517,  as  amended  by P.L.  98-620,  MetaMorphix
                  hereby grants to GI and its designated  Affiliates which agree
                  in writing  to comply  with the terms and  conditions  of this
                  -Agreement  (with  a copy  of  such  written  agreement  being
                  provided to MetaMorphix) an exclusive, royalty-bearing license
                  under the MetaMorphix GDF-8 Technology, including the right to
                  grant  sublicenses,  (i) to  make,  have  made,  use,  import,
                  market, offer for sale and sell GDF-8 Licensed Products in the
                  Territory,  in each case  only for use  solely in the GI Field
                  and (ii) to make,  have made and use GDF-8  Licensed  Products
                  and  MetaMorphix   Excluded   Products  for  GI's  and/or  its
                  designated
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                  Affiliates'   internal   research  and  development   purposes
                  (PROVIDED,  HOWEVER,  that no MetaMorphix Excluded Product may
                  be the  subject of a GI animal or clinical  study  without the
                  express prior  written  consent of  MetaMorphix,  which may be
                  withheld in its sole discretion). The license granted pursuant
                  to this  Section  2.1  shall  continue  in  effect  until  the
                  expiration of the last of the GDF-8 Patent Rights containing a
                  Valid Claim  licensed to GI under this Section 2.1,  PROVIDED,
                  HOWEVER, that thereafter, GI shall have a fully-paid,  royalty
                  free, perpetual,  irrevocable non-exclusive license to use the
                  MetaMorphix   GDF-8   Know-How  for  any  and  all   research,
                  development and commercialization purposes.
         2.2      LICENSES GRANTED TO METAMORPHIX.  To the extent not granted to
                  MetaMorphix  under the 1999 Agreement,  and subject to (i) the
                  terms and conditions of this  Agreement,  (ii) the reservation
                  of rights set forth in Section 6.6 of the 1999  Agreement  and
                  (iii) any rights  retained by the United States  government in
                  accordance with P.L.  96-517,  as amended by P.L.  98-620,  GI
                  hereby grants to  MetaMorphix  and its  designated  Affiliates
                  which agree in writing to comply with the terms and conditions
                  of this Agreement (with a copy of such written agreement being
                  provided  to GI) an  exclusive  (exclusive,  even  as to  GI),
                  royalty-bearing   license  under  the  GI  GDF-8   Technology,
                  including the right to grant  sublicenses,  (i) to make,  have
                  made,  use,  import,  market,  offer  for sale and sell  GDF-8
                  Licensed Products in the Territory,  in each case only for use
                  solely in the  MetaMorphix  Field and (ii) to make,  have made
                  and use GDF-8 Licensed  Products and GI Excluded  Products for
                  MetaMorphix's  and/or  its  designated   Affiliates'  internal
                  research and development purposes (PROVIDED,  HOWEVER, that no
                  GI Excluded Product may be the subject of a MetaMorphix animal
                  or clinical study without the express prior written consent of
                  GI, which may be withheld in its sole discretion). The license
                  granted  pursuant to this Section 2.2 shall continue in effect
                  until the  expiration  of the last of the GDF-8 Patent  Rights
                  containing a Valid Claim  licensed to  MetaMorphix  under this
                  Section 2.1, PROVIDED,  HOWEVER, that thereafter,  MetaMorphix
                  shall have a fully-paid, royalty free, perpetual,  irrevocable
                  non-exclusive  license to use the GI GDF8 Know-How for any and
                  all research, development and commercialization purposes.
         2.3      OPTION FOR CERTAIN EXCLUDED PRODUCTS. In the event that either
                  GI or MetaMorphix develops or otherwise acquires rights to any
                  Excluded  Product  and  such  Party  determines,  in its  sole
                  reasonable business judgment, that the inclusion by it of such
                  Excluded  Product within the license granted under Section 2.1
                  or Section 2.2, as the case may be, would not  interfere  with
                  its  product  development  and/or  commercialization  of  such
                  Excluded Product,  such Party (the "Offering Party") agrees to
                  extend to the other Party, by written notice,  the opportunity
                  to  negotiate  a  royalty-bearing  license  to  such  Excluded
                  Product, which license would (a) be restricted to the GI Field
                  or the
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                  MetaMorphix  Field,  as  applicable,   (b)  provide  for  such
                  royalties,  reports, and records as are set forth in Section 4
                  herein (and otherwise  incorporate  the provisions of Sections
                  9, 10, and 11), and (c) may provide for reasonable  parameters
                  for  clinical  testing,  regulatory  approaches,  and labeling
                  requirements.  Within  thirty  (30)  days  of  receiving  such
                  notice,  such  other  Party  may  elect to  negotiate  such an
                  agreement  (which shall become an amendment of this Agreement)
                  by  providing  the  Offering  Party  written  notice  of  such
                  election,  in which event the Parties would promptly  commence
                  good faith  negotiations  of the license terms (as provided in
                  this Section 2.3). If  MetaMorphix  and GI are unable to agree
                  on the terms and  conditions  of such a license  within ninety
                  (90) days after the Offering  Party  receives such notice from
                  the other Party,  the Offering  Party shall  thereafter not be
                  free to grant such  rights and  licenses  to any Third  Party.
                  This Section 2.3 is intended to amend and replace  Section 6.9
                  of  the  1999   Agreement  with  respect  to  the  rights  and
                  obligations conferred upon GI and MetaMorphix  thereunder and,
                  as such,  this  Section  2.3 shall  govern  and  control  with
                  respect to both this Agreement and the 1999 Agreement.
         2.4      RIGHTS  LICENSED  FROM  THIRD  PARTIES.  In the event that the
                  license  to  MetaMorphix  or GI  under  Sections  2.1  or  2.2
                  includes  rights  acquired by the licensor  Party from a Third
                  Party  (other than from JHU  pursuant  to the 1999  Agreement)
                  which involve the payment of royalties, fees or other payments
                  to such Third  Party,  the  licensor  Party  shall  notify the
                  licensee Party of the obligation to make such payment(s).  The
                  licensee  Party  promptly  shall  elect in writing  whether to
                  exclude such Third Party  rights from the licenses  granted to
                  it under this  Agreement,  and if the licensee  Party fails to
                  exclude such  rights,  it shall be fully  responsible  for the
                  payment of any such royalties, fees and other payments to such
                  Third  Party  as a  result  of its  practice  of the  licenses
                  granted to it hereunder.
         2.5      NONCOMPETE.
                  2.5.1    BY METAMORPHIX. MetaMorphix and GI agree that, for so
                           long as the  licenses  granted to GI,  under  Section
                           2.1,  with  respect to the  Product  Development  and
                           commercialization of GDF-8 Licensed Products,  remain
                           in  effect,  MetaMorphix  will not sell or  otherwise
                           distribute  any  GDF-8  Product  or GDF-8  Derivative
                           Product  for  use  in  the GI  Field.  The  preceding
                           sentence   shall  not  apply  to  any  products  that
                           MetaMorphix obtains,  other than through the grant of
                           rights under the 1999  Agreement,  from a Third Party
                           who has  developed  (or obtained  from another  Third
                           Party  who  has  developed)  such  products   without
                           infringing  issued patents of GI included  within the
                           GI GDF-8 Patent  Rights under this  Agreement,  which
                           products were fully developed by or on behalf of such
                           Third  Party  without  the use of any of the GI GDF-8
                           Know-How or any Confidential  Information of GI. GI's
                           right to enforce this Section 2.5.1 shall not
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                           be assignable, except to its Affiliates. This Section
                           2.5.1 is not  intended  as an  amendment  of  Section
                           6.8.1  of the 1999  Agreement  but,  rather,  confers
                           rights and obligations in addition to those set forth
                           in Section 6.8.1 of the 1999 Agreement.
                  2.5.2    BY GI. GI and MetaMorphix  agree that, for so long as
                           the licenses  granted to  MetaMorphix,  under Section
                           2.2,  with  respect to the  Product  Development  and
                           commercialization of GDF-8 Licensed Products,  remain
                           in effect,  GI will not sell or otherwise  distribute
                           any GDF-8 Product or GDF-8 Derivative Product for use
                           in the  MetaMorphix  Field.  The  preceding  sentence
                           shall  not  apply to any  products  that GI  obtains,
                           other than through the grant of rights under the 1999
                           Agreement,  from a Third Party who has  developed (or
                           obtained from another Third Party who has  developed)
                           such  products  without   infringing  issued  patents
                           included within the  MetaMorphix  GDF-8 Patent Rights
                           under  this  Agreement,  which  products  were  fully
                           developed by or on behalf of such Third Party without
                           the  use of any of the  MetaMorphix  Know-How  or any
                           Confidential      Information     of     MetaMorphix.
                           MetaMorphix's  right to enforce  this  Section  2.5.2
                           shall not be  assignable,  except to its  Affiliates.
                           This Section 2.5.2 is not intended as an amendment of
                           Section  6.8.2 of the  1999  Agreement  but,  rather,
                           confers  rights and  obligations in addition to those
                           set forth in Section 6.8.2 of the 1999 Agreement.
         2.6      HSR FILING AND APPROVALS.
                  2.6.1    HSR FILING.  As soon as practicable  (consistent with
                           each Party's  procedures  for doing so, each of Wyeth
                           and MetaMorphix  shall  determine,  in its respective
                           reasonable judgment, whether any filings are required
                           under the HSR Act and shall notify the other Party of
                           the  determination so made. In the event either Party
                           determines  that such filings should be made, each of
                           MetaMorphix and GI shall file, as soon as practicable
                           thereafter,  with the Federal Trade  Commission  (the
                           "FTC")  and  the  Antitrust  Division  of the  United
                           States   Department   of  Justice   (the   "Antitrust
                           Division")  the  notification  and  report  form (the
                           "Report")  required under the HSR Act with respect to
                           the  transactions  as  contemplated  hereby and shall
                           reasonably  cooperate  with  the  other  Party to the
                           extent  necessary  to assist  the other  Party in the
                           preparation  of its  Report  and to proceed to obtain
                           necessary  approvals under the HSR Act, including but
                           not limited to the expiration or earlier  termination
                           of any and all applicable waiting periods required by
                           the HSR Act. The Parties  shall share  equally in any
                           fees required to be paid to any  governmental  agency
                           in connection with making such filings and each Party
                           shall bear its own expenses, including, without
CONFIDENTIAL                          -9-
                           limitation,  legal fees,  incurred in connection with
                           preparing such filings.
                  2.6.2    METAMORPHIX'S   AND   GI'S   OBLIGATIONS.   Each   of
                           MetaMorphix  and GI shall use its good faith  efforts
                           to eliminate  any concern on the part of any court or
                           government  authority  regarding  the legality of the
                           proposed  transaction,   including,  if  required  by
                           federal  or  state  antitrust  authorities,  promptly
                           taking  all  steps  to  secure  government  antitrust
                           clearance, including, without limitation, cooperating
                           in  good  faith  with  any  government  investigation
                           including  the prompt  production  of  documents  and
                           information   demanded   by  a  second   request  for
                           documents and of witnesses if requested.
                  2.6.3    ADDITIONAL   APPROVALS.   MetaMorphix   and  GI  will
                           cooperate and use respectively all reasonable efforts
                           to  make  all  other   registrations,   filings   and
                           applications,  to give all  notices  and to obtain as
                           soon  as  practicable   all   governmental  or  other
                           consents,      transfers,      approvals,     orders,
                           qualifications  authorizations,  permits and waivers,
                           if  any,  and to do all  other  things  necessary  or
                           desirable for the consummation of the transactions as
                           contemplated hereby. Neither Party shall be required,
                           however,  to divest  products or assets or materially
                           change its  business  if doing so is a  condition  of
                           obtaining   approval  under  the  HSR  Act  or  other
                           governmental    approvals    of   the    transactions
                           contemplated by this Agreement.
3. INFORMATION DISCLOSURE; EXCLUDED PRODUCTS.
         3.1      RESEARCH MANAGEMENT COMMITTEE.  Within thirty (30) days of the
                  Effective  Date,  the  Parties  shall  reestablish  a Research
                  Management  Committee ("RMC") consisting of an equal number of
                  between  two (2) and four (4)  representatives  of each Party.
                  The  sole  functions  of the RMC  shall be to  facilitate  the
                  exchange of ideas and information by GI and MetaMorphix  under
                  this  Agreement.  The RMC  shall  have no right  to amend  any
                  provision of this Agreement.  The RMC shall meet at least once
                  during  each  calendar  half-year  (or more or less often as a
                  majority of the members of the RMC may agree)  during the term
                  of this Agreement. Meetings of the RMC shall alternate between
                  GI and MetaMorphix locations,  provided that such meetings may
                  also  be  held   telephonically  or  by   videoconference   as
                  determined by the members of the RMC.
         3.2      INFORMATION  DISCLOSURE.  Each of GI and MetaMorphix shall use
                  its Commercially  Reasonable Efforts to disclose, via exchange
                  of information at
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                  meetings  of the  RMC  and  provision  of  reports  (if and as
                  available),  to the  other  Party,  a summary  of those  GDF-8
                  Patent  Rights  and  GDF-8  Know-How  that has come  into such
                  Party's Control and has not been  previously  disclosed to the
                  other Party.  Upon  important  discoveries  or advances  being
                  made,   such  Party  shall   endeavor  to  disclose  such  new
                  information   prior   to  the   next   meeting   of  the  RMC.
                  Notwithstanding  the  foregoing,  it shall  not be a breach of
                  this   Agreement,   if  a  Party  has  used  its  good   faith
                  Commercially   Reasonable   Efforts  to  disclose  such  GDF-8
                  Know-How but has failed to disclose all such GDF-8 Know-How to
                  the other Party  (provided that, upon request by the receiving
                  Party or awareness of the disclosing  Party,  such undisclosed
                  information  is then promptly  disclosed).  From time to time,
                  upon request,  a disclosing  Party shall endeavor,  but not be
                  obligated   to  provide  the   receiving   Party  with  sample
                  quantities  of  proteins  and other  materials  to assist  the
                  receiving   Party   in  its   assessment   of  the   disclosed
                  Confidential  Information.  Any GDF-8  Know-How  disclosed  or
                  materials  provided by a Party pursuant to this Section 3.2 or
                  otherwise to the other Party shall be treated as  Confidential
                  Information of the disclosing Party in accordance with Article
                  7 hereof.
         3.3      EXCLUDED PRODUCTS.  From time to time, each Party may, in good
                  faith and by  written  notice to the  other  Party,  designate
                  certain GDF-8 Products and GDF-8  Derivative  Products  (other
                  than,  (i) in the  case  of GI  making  a  designation,  GDF-8
                  Products or GDF-8 Derivative  Products consisting of compounds
                  or  compositions  where such  compounds  or  compositions  are
                  Controlled by MetaMorphix and are initially  provided to GI by
                  MetaMorphix  under this  Agreement or the 1999  Agreement  and
                  (ii) in the case of MetaMorphix  making a  designation,  GDF-8
                  Products or GDF-8 Derivative  Products consisting of compounds
                  or  compositions  where such  compounds  or  compositions  are
                  Controlled by GI and are initially  provided to MetaMorphix by
                  GI under this Agreement or the 1999  Agreement),  as either GI
                  Excluded  Products  or  MetaMorphix   Excluded  Products,   as
                  applicable.  Such notice shall detail the  rationale  for such
                  designation.  A Party may designate a GDF-8 Product or a GDF-8
                  Derivative  Product  as  either  a GI  Excluded  Product  or a
                  MetaMorphix   Excluded   Product  only  if  such  Party  (upon
                  successful,  in vivo, proof of concept) has initiated  Product
                  Development of such GDF-8 Product or GDF-8 Derivative Product,
                  PROVIDED,  HOWEVER, that upon designating any GDF-8 Product or
                  GDF-8  Derivative   Product  as  an  Excluded   Product,   the
                  designating Party may also designate as Excluded  Products,  a
                  reasonable  number of other GDF-8 Products or GDF-8 Derivative
                  Products (as the case may be),  which GDF-8  Products or GDF-8
                  Derivative Products not only are in the same chemical class or
                  biological  class  as the  GDF-8  Product  or GDF-  Derivative
                  Product primarily  selected as an Excluded  Product,  but also
                  are intended be back-up candidates (to the extent customary in
                  the  pharmaceutical   industry)  for  the  primarily  selected
                  Excluded  Product.  For the sake of  clarity,  a Party may not
                  designate  a  broad   category  of  GDF-8  Products  or  GDF-8
                  Derivative
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                  Products  (e.g.,  all  antibodies,   or  all  compounds  of  a
                  particular  chemical class, or a biological class) as Excluded
                  Products,  merely  because  such Party has  initiated  Product
                  Development of a GDF-8 Product or a GDF-8  Derivative  Product
                  within such category.  A designated  Excluded Product shall be
                  only an active ingredient or a single molecule.  Except to the
                  extent  provided  otherwise  in Section 2.4 above,  during the
                  term of this  Agreement,  MetaMorphix  shall  not  develop  or
                  commercialize any GI Excluded Product in the MetaMorphix Field
                  and GI shall not  develop  or  commercialize  any  MetaMorphix
                  Excluded Product in the GI Field.
4.        ROYALTIES.
         4.1      PAYABLE  BY GI. GI shall pay to  MetaMorphix,  on a country by
                  country  basis, a royalty in the amount of two percent (2%) of
                  the Net  Sales of each  GDF-8  Licensed  Product  sold in such
                  country by or on behalf of GI, its Affiliates or  sublicensees
                  (other than  MetaMorphix)  pursuant to the licenses granted by
                  MetaMorphix to GI hereunder.  Such royalties shall be payable,
                  on a country by country basis, for so long as the manufacture,
                  use or sale of such GDF-8  Licensed  Product  in such  country
                  would,  but for the  licenses  granted  by  MetaMorphix  to GI
                  hereunder,  infringe a Valid Claim of a patent included within
                  the MetaMorphix  GDF-8 Patent Rights or the Joint GDF-8 Patent
                  Rights  licensed by  MetaMorphix  to GI hereunder and shall be
                  incremental to any royalty  payable under the 1999  Agreement,
                  PROVIDED,  HOWEVER,  that  the  grant  of  rights  under  this
                  Agreement  shall not serve to extend the period of time during
                  which royalties are payable under the 1999 Agreement.
         4.2      PAYABLE  BY  METAMORPHIX.  MetaMorphix  shall  pay to GI, on a
                  country  by  country  basis,  a royalty  in the  amount of two
                  percent (2%) of the Net Sales of each GDF-8  Licensed  Product
                  sold in such  country  by or on  behalf  of  MetaMorphix,  its
                  Affiliates  or  sublicensees  (other than GI)  pursuant to the
                  licenses  granted  by  GI  to  MetaMorphix   hereunder.   Such
                  royalties shall be payable, on a country by country basis, for
                  so long as the manufacture, use or sale of such GDF-8 Licensed
                  Product in such country would, but for the licenses granted by
                  GI to  MetaMorphix  hereunder,  infringe  a Valid  Claim  of a
                  patent included within the GI GDF-8 Patent Rights or the Joint
                  GDF-8 Patent Rights  licensed by GI to  MetaMorphix  hereunder
                  and shall be incremental to any royalty payable under the 1999
                  Agreement,  PROVIDED,  HOWEVER, that the grant of rights under
                  this  Agreement  shall not serve to extend  the period of time
                  during which royalties are payable under the 1999 Agreement.
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         4.3      ROYALTY CALCULATIONS.
                  4.3.1    COUNTRY-BY-COUNTRY  BASIS.  For each  GDF-8  Licensed
                           Product,  royalties  shall be payable by a Party on a
                           country-by-country  basis  solely with respect to Net
                           Sales  for any  country  where  such  GDF-8  Licensed
                           Product is  manufactured  or sold in which there is a
                           Valid Claim under the applicable GDF-8 Patent Rights.
                           However,  for sales of a GDF-8 Licensed Product which
                           is  manufactured  in a  country  in which  there is a
                           Valid Claim under the applicable GDF-8 Patent Rights,
                           but sold in a  country  where  there  is no  existing
                           Valid Claim under the applicable GDF-8 Patent Rights,
                           the  royalties  payable  hereunder by the Parties for
                           sales  in that  country  shall  be  reduced  by fifty
                           percent  (50%) if  products  are  being  sold in that
                           country  which  directly   compete  with  such  GDF-8
                           Licensed Product.
                  4.3.2    ADVANCED PRODUCTS.  For GDF-8 Licensed Products which
                           are   not   finished   formulations,    mixtures   or
                           compositions  of GDF-8  (that is, for GDF-8  Licensed
                           Products  which  could not have been  developed  by a
                           Party but for the application of substantial advanced
                           technologies  developed  by  that  Party  (including,
                           without limitation, GDF-8 Licensed Products which are
                           antibodies,  antisense  molecules  or  ribozymes  to,
                           GDF-8),   the  royalty  payable   hereunder  by  that
                           developing  Party on Net Sales of that GDF-8 Licensed
                           Product  shall be reduced to reflect  the fair market
                           value contribution of that advanced technology to the
                           GDF-8  Licensed  Product,  as  determined  by  mutual
                           agreement  of the  Parties.  In the  event  that  the
                           Parties  are  unable to  calculate  or agree upon the
                           fair  market  value   contribution  of  the  advanced
                           technology to the GDF-8  Licensed  Product,  then the
                           royalty payable by the developing  Party on Net Sales
                           of that GDF-8  Licensed  Product  shall be reduced by
                           fifty percent (50%).
                  4.3.3    THIRD PARTY ROYALTIES.  If it becomes  necessary,  in
                           order for a Party or its  Affiliates or  sublicensees
                           to make, use or sell any GDF-8 Licensed  Product,  to
                           pay  royalties  under a Third  Party's  patent rights
                           (including  amounts, if any, payable to Third Parties
                           under  Section  2.4,  above;   and  with  respect  to
                           MetaMorphix,  excluding amount payable by MetaMorphix
                           to GI under this  Agreement or to JHU and/or GI under
                           the 1999 Agreement; and with respect to GI, excluding
                           amount  payable  by  GI  to  MetaMorphix  under  this
                           Agreement or to MetaMorphix and/or JHU under the 1999
                           Agreement),  then the  licensee  Party shall have the
                           right to deduct fifty percent (50%) of the amounts so
                           paid to Third  Parties up to a total of fifty percent
                           (50%) of the amount  due  hereunder  to the  licensor
                           Party on account of such  particular  GDF-8  Licensed
                           Product.
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                  4.3.4    LIMITATION  ON  ROYALTY  DEDUCTIONS.   Total  royalty
                           deductions  under this  Section  4.3 shall not exceed
                           fifty  percent  (50%) of the amount due the  licensor
                           Party on account  of Net Sales of the GDF-8  Licensed
                           Product, for which royalty payments are owed.
         4.4      REPORTS AND PAYMENT.  Each Party shall deliver to the Party to
                  which  royalties  are owed  hereunder,  within sixty (60) days
                  after  the end of each  calendar  quarter,  a  written  report
                  showing its  computation of royalties due under this Agreement
                  upon Net Sales by such Party,  its Affiliates and sublicensees
                  during such calendar quarter. All Net Sales shall be segmented
                  in each such report  according  to sales by such  Party,  each
                  Affiliate   and   each   sublicensee,   as   well   as   on  a
                  country-by-country basis, including the rates of exchange used
                  to convert such  royalties to United  States  Dollars from the
                  currency  in  which  such  sales  were  made.  Subject  to the
                  provisions  of  Sections  4.5  and  4.6  of  this   Agreement,
                  simultaneously  with the  delivery  of each such  report,  the
                  paying Party shall tender  payment in United States Dollars of
                  all  royalties  shown to be due  therein.  Such reports may be
                  combined  with any report to be submitted by such Party to the
                  other Party  pursuant to the 1999  Agreement,  provided,  that
                  such combined  report  separately  states the amounts  payable
                  under the 1999  Agreement  and the amounts  payable under this
                  Agreement.  For purposes  hereof,  the rates of exchange to be
                  used for  converting  royalties  hereunder  to  United  States
                  Dollars shall be the closing price  published for the purchase
                  of United States Dollars in the East Coast Edition of the Wall
                  Street  Journal  for the  last  business  day of the  calendar
                  quarter for which payment is due.
         4.5      FOREIGN ROYALTIES. Where royalties are due hereunder for sales
                  of GDF-8 Licensed  Products in a country  where,  by reason of
                  currency regulations or taxes of any kind, it is impossible or
                  illegal  for such  Party,  any  Affiliate  or  sublicensee  to
                  transfer  royalty payments to the licensor Party for Net Sales
                  in that country, such royalties shall be deposited in whatever
                  currency is allowable by the person or entity not able to make
                  the transfer  for the benefit or credit of the licensor  Party
                  in an  accredited  bank in  that  country  that is  reasonably
                  acceptable to the licensor Party.
         4.6      TAXES.  Any and all income or similar  taxes imposed or levied
                  on account  of the  receipt of  royalties  payable  under this
                  Agreement  which are  required to be withheld by a Party shall
                  be paid by such  Party,  its  Affiliates  or  sublicensees  on
                  behalf of the  licensor  Party and shall be paid to the proper
                  taxing  authority.  Proof of payment shall be secured and sent
                  to the  licensor  Party  by  such  Party,  its  Affiliates  or
                  sublicensees  as  evidence  of such  payment  in such  form as
                  required by the tax authorities having  jurisdiction over such
                  Party,  its  Affiliates or  sublicensees.  Such taxes shall be
                  deducted  from the royalty that would  otherwise be remittable
                  hereunder by the Party, its Affiliates or sublicensees.
CONFIDENTIAL                          -14-
          4.7     RECORDS.   Each  Party  shall  keep,  and  shall  require  all
                  Affiliates and  sublicensees to keep, for a period of at least
                  two (2) years,  full,  true and accurate books of accounts and
                  other records containing all information and data which may be
                  necessary to  ascertain  and verify the  royalties  payable by
                  such Party  hereunder.  During the term of this  Agreement and
                  for a period of two (2) years following its termination,  each
                  Party  shall  have the right  from time to time (not to exceed
                  once during each calendar year) to inspect in  confidence,  or
                  have an agent,  accountant or other representative  inspect in
                  confidence, such books, records and supporting data.
5.       PRODUCT DEVELOPMENT AND COMMERCIALIZATION.
          5.1     DILIGENCE  OBLIGATIONS.  GI and MetaMorphix each shall have no
                  diligence  obligations with respect to the Product Development
                  or  commercialization  of any GDF-8 Licensed  Product over and
                  above those set forth in the 1999 Agreement.
6.       PATENT PROSECUTION AND INFRINGEMENT.
         6.1      RESPONSIBILITY FOR PATENTING GDF-8 PATENT RIGHTS.
                  6.1.1    GI GDF-8 PATENT RIGHTS AND CERTAIN JOINT GDF-8 PATENT
                           RIGHTS. Subject to the rights and obligations of each
                           of the Parties and JHU under the 1999  Agreement,  GI
                           shall have the first right,  but not the  obligation,
                           to  seek or  continue  to  seek  or  maintain  Patent
                           protection  on any GI  GDF-8  Patent  Rights  and any
                           Joint GDF-8  Patent  Rights,  in any  country.  If GI
                           elects,  in any  country  not to seek or  continue to
                           seek or maintain Patent  protection on any such GDF-8
                           Patent Rights,  to the extent the  manufacture use or
                           sale, by  MetaMorphix,  of a GDF-8  Licensed  Product
                           would  infringe  such  GDF-8  Patent  Rights  in such
                           country,  MetaMorphix  shall have the right,  but not
                           the obligation,  at its expense, to file, procure and
                           maintain  in  such  country(ies)  such  GDF-8  Patent
                           Rights.
                  6.1.2    METAMORPHIX  GDF-8  PATENT  RIGHTS.  Subject  to  the
                           rights and  obligations  of the Parties and JHU under
                           the 1999 Agreement,  MetaMorphix shall have the first
                           right, but not the obligation, to seek or continue to
                           seek  -  or  maintain   Patent   protection   on  any
                           MetaMorphix  GDF-8 Patent  Rights in any country.  If
                           MetaMorphix elects not to seek or continue to seek or
                           maintain Patent  protection on any MetaMorphix  GDF-8
                           Patent  Rights  in any  country,  GI  shall  have the
                           right,  but not the  obligation,  at its expense,  to
                           file,  procure and maintain in such country(ies) such
                           MetaMorphix GDF-8 Patent Rights.
CONFIDENTIAL                          -15-
                  6.1.3    PATENT COOPERATION. Each Party shall advise the other
                           Party of all  decisions  taken under this Section 6.1
                           in a timely  manner in order to allow the other Party
                           to protect its rights under this  Section  6.1.  Each
                           Party  shall  provide  the other Party with copies of
                           all  substantive   communications   from  all  patent
                           offices  regarding any GDF-8 Patent Rights,  promptly
                           after the receipt  thereof.  Each Party shall provide
                           the  other   Party  with   copies  of  all   proposed
                           substantive  communications  to such  patent  offices
                           regarding the GDF-8 Patent Rights in sufficient  time
                           before  the due  date in order to  enable  the  other
                           applicable  Party an  opportunity  to  comment on the
                           content  thereof.  Each Party shall make available to
                           the other Party, or its authorized attorneys,  agents
                           or  representatives,  such of its employees  whom the
                           other applicable  Party, in its reasonable  judgment,
                           deems  necessary  in order to assist it in  obtaining
                           Patent  protection  for the  applicable  GDF-8 Patent
                           Rights,  in the event the Party with first  rights to
                           seek  or  continue   to  seek  or   maintain   Patent
                           protection on any such GDF-8Patent Rights chooses not
                           to do so.  Each  Party  shall  sign or use  its  best
                           efforts to have signed all legal documents  necessary
                           to  file  and  prosecute  Patents  or  to  obtain  or
                           maintain Patents at no cost to the other Party.  Each
                           Party  shall  bear  all  costs   incurred  by  it  in
                           exercising the foregoing rights.
                  6.1.4    INTERFERENCES. The Parties shall each, in good faith,
                           use its respective Commercially Reasonable Efforts to
                           resolve any patent  interferences  between any of the
                           Parties  relating to Patents directed to GDF-8 or any
                           GDF-8 Licensed Product.
         6.2      INFRINGEMENT.
                  6.2.1    NOTICE.  Each Party shall promptly  report in writing
                           to the other Party during the term of this  Agreement
                           any (i) known infringement or suspected  infringement
                           of  any  of  the   GDF-8   Patent   Rights   or  (ii)
                           unauthorized  use or  misappropriation  of the  other
                           Party's Confidential  Information by a Third Party of
                           which it becomes  aware,  and shall provide the other
                           Parties with all available  evidence  supporting said
                           infringement,  suspected infringement or unauthorized
                           use or misappropriation.
                  6.2.2    FIRST RIGHT TO INITIATE SUITS.  Subject to the rights
                           and   obligations  of  the  Parties  under  the  1999
                           Agreement,  MetaMorphix shall have the first right to
                           initiate an  infringement or other  appropriate  suit
                           against   any  Third   Party  who  at  any  time  has
                           infringed, or is suspected of infringing,  any of the
                           MetaMorphix   GDF-8  Patent  Rights  licensed  to  GI
                           hereunder or of using  without  proper  authorization
                           all or any of MetaMorphix's Confidential Information,
                           where such infringement,
CONFIDENTIAL                          -16-
                           suspected   infringement  or   unauthorized   use  is
                           determined by  MetaMorphix  to have an adverse affect
                           on its  ability to make,  have made,  use and/or sell
                           GDF-8 Licensed Products,  PROVIDED,  HOWEVER, that GI
                           shall  have  the  first   right  to   initiate   such
                           infringement  or other  appropriate  suit against any
                           such  Third  Party,  where the  actual  or  suspected
                           infringement  is occurring  only in the GI Field.  GI
                           shall   have  the   first   right  to   initiate   an
                           infringement  or other  appropriate  suit against any
                           Third  Party  who at any  time has  infringed,  or is
                           suspected of  infringing,  any of the GI GDF-8 Patent
                           Rights licensed to MetaMorphix hereunder or the Joint
                           GDF-8  Patent  Rights,  or of  using  without  proper
                           authorization   all  or  any  of  GI's   Confidential
                           Information,   where  such  infringement,   suspected
                           infringement or unauthorized  use is determined by GI
                           to have an  adverse  affect on its  ability  to make,
                           have made, use and/or sell GDF-8  Licensed  Products.
                           GI and  MetaMorphix  agree to consult with each other
                           prior to instituting any such suit and to provide the
                           other Party a reasonable  opportunity to participate,
                           at its own  expense,  in any such suit to protect its
                           respective interests.
                  6.2.3    RIGHT TO PARTICIPATE IN SUIT. The Party  initiating a
                           suit  pursuant  to Section  6.2.2  above (the  "first
                           Party")  shall  give the  other  Party  (the  "second
                           Party")  sufficient  advance  notice of its intent to
                           file said suit and the  reasons  therefor,  and shall
                           provide the second Party with an  opportunity to make
                           suggestions   and  comments   regarding   such  suit,
                           including, without limitation, the initiation thereof
                           and the  selection  of  counsel  therefor.  The first
                           Party shall keep the second Party promptly  informed,
                           and shall from time to time  consult  with the second
                           Party regarding the status of any such suit and shall
                           provide the second Party with copies of all documents
                           filed in, and all written communications relating to,
                           such suit. Except as provided herein, the first Party
                           shall  have the sole and  exclusive  right to  select
                           counsel  for any suit and shall pay all  expenses  of
                           the suit,  including  without  limitation  attorneys'
                           fees and court costs.  The second Party,  in its sole
                           discretion,  may elect,  within sixty (60) days after
                           the commencement of such litigation,  to contribute a
                           fixed  percentage of up to fifty percent (50%) of the
                           costs incurred by the first Party in connection  with
                           such  litigation,   including,   without  limitation,
                           reimbursement   of   the   first   Party's   expenses
                           hereunder.  If it so elects, any damages,  royalties,
                           settlement  fees or other  consideration  received by
                           the  first  Party or any of its  Affiliates  for past
                           infringement or  misappropriation as a result of such
                           litigation  shall be shared  by the first and  second
                           Parties pro-rata based on their respective sharing of
                           the  costs of such  litigation,  subject  to  Section
                           6.2.5,  below.  In the event  that the  second  Party
                           elects  not  to  contribute  to  the  costs  of  such
                           litigation,  the first  Party  and/or its  Affiliates
                           shall be entitled to retain any  damages,  royalties,
                           settlement
CONFIDENTIAL                          -17-
                           fees or other  consideration for past infringement or
                           misappropriation  resulting  therefrom,   subject  to
                           Section 6.2.5, below. If necessary or desirable,  the
                           second  Party  shall  join as a party to the suit but
                           shall be under no obligation to participate except to
                           the extent that such participation is required as the
                           result of being a named party to the suit. The second
                           Party shall offer reasonable  assistance to the first
                           Party in  connection  therewith  at no  charge to the
                           first Party except for  reimbursement  of  reasonable
                           out-of-pocket  expenses.  The second Party shall have
                           the right to  participate  and be  represented in any
                           such suit by its own counsel at its own expense.  The
                           first Party shall not settle any such suit  involving
                           rights of the  second  Party  without  obtaining  the
                           prior  written  consent  of the second  Party,  which
                           consent  shall  not  be   unreasonably   withheld  or
                           delayed.
                  6.2.4    SECOND RIGHT TO INITIATE  SUIT. In the event that the
                           first Party elects not to initiate an infringement or
                           other  appropriate  suit pursuant to Sections  6.2.2,
                           above, as applicable,  the first Party shall promptly
                           advise the second Party of its intent not to initiate
                           such suit, and the second Party shall have the right,
                           at its expense,  of  initiating  an  infringement  or
                           other appropriate suit against any Third Party who at
                           any  time  has   infringed,   or  is   suspected   of
                           infringing, any of the GDF8 Patent Rights or of using
                           without  proper  authorization  all or any portion of
                           such Party's Confidential Information.  In exercising
                           its  rights  pursuant  to this  Section  6. 2. 4, the
                           second Party shall have the sole and exclusive  right
                           to select  counsel  and  shall,  except  as  provided
                           below, pay all expenses of the suit including without
                           limitation attorneys' fees and court costs. The first
                           Party,  in its sole  discretion,  may  elect,  within
                           sixty  (60)  days  after  the  commencement  of  such
                           litigation, to contribute a fixed percentage of up to
                           fifty  percent  (50%) of the  costs  incurred  by the
                           second  Party in  connection  with  such  litigation,
                           including,  without limitation,  reimbursement of the
                           second Party's expenses  hereunder.  If it so elects,
                           any  damages,  royalties,  settlement  fees or  other
                           consideration  received by the second Party or any of
                           its    Affiliates    for   past    infringement    or
                           misappropriation as a result of such litigation shall
                           be shared by the  second and first  Parties  pro-rata
                           based on their  respective  sharing  of the  costs of
                           such  litigation,  subject to Section 6. 2. 5, below.
                           In the  event  that the  first  Party  elects  not to
                           contribute  to the  costs  of  such  litigation,  the
                           second Party and/or its Affiliates  shall be entitled
                           to retain any damages, royalties,  settlement fees or
                           other   consideration   for  past   infringement   or
                           misappropriation  resulting  therefrom,   subject  to
                           Section 6.2.5, below. If necessary or desirable,  the
                           first  Party  shall  join as a party  to the suit but
                           shall be under no obligation to participate except to
                           the extent that such  participation  is required as a
                           result  of being a named  party to the  suit.  At the
                           second Party's  request,  the first Party shall offer
                           reasonable assistance to the second
CONFIDENTIAL                          -18-
                           Party in  connection  therewith  at no  charge to the
                           second Party except for  reimbursement  of reasonable
                           out-of-pocket  expenses.  The first  Party shall have
                           the right to  participate  and be  represented in any
                           such suit by its own counsel at its own expense.
                  6.2.5    ROYALTY DEDUCTION. Any damages, royalties, settlement
                           fees or other  consideration for past infringement or
                           misappropriation  awarded  to and/or  collected  by a
                           Party (or Parties)  resulting from an infringement or
                           other  appropriate  suit  against a Third  Party or a
                           settlement  thereof  shall,  after  deduction  of all
                           costs  and  expenses  associated  with  such  suit or
                           settlement, be deemed to reflect a loss of commercial
                           sales,  and royalties shall be payable thereon to the
                           Party (or Parties) to which royalties would have been
                           owed under  Section 4.1 of this  Agreement,  provided
                           that such Party is not otherwise  entitled to receive
                           a portion of any recovery other than reimbursement of
                           its litigation  expenses)  obtained from such suit or
                           settlement pursuant to this Section 6.2.
         6.3      CLAIMED INFRINGEMENT.
                  6.3.1    NOTICE;  COOPERATION. In the event that a Third Party
                           at any time provides written notice of a claim to, or
                           brings an action,  suit or  proceeding  against,  any
                           Party or any of their  respective  Affiliates  or sub
                           licensees, claiming infringement of its patent rights
                           or copyrights or unauthorized use or misappropriation
                           of  its  Confidential  Information,   based  upon  an
                           assertion  or claim  arising out of the  manufacture,
                           use and/or sale of any GDF-8 Product  pursuant to the
                           licenses  granted  under this  Agreement,  such Party
                           shall promptly  notify the other Parties of the claim
                           or  the   commencement   of  such  action,   suit  or
                           proceeding,  enclosing a copy of the claim and/or all
                           papers served. Each Party agrees to make available to
                           the other Party its advice and counsel  regarding the
                           technical  merits of any such claim at no cost to the
                           other Party.
                  6.3.2    LIMITATION  OF  LIABILITY.  EXCEPT  FOR  BREACHES  OF
                           SECTIONS  8.1,  8.2 AND 8.3 OF  THIS  AGREEMENT,  THE
                           FOREGOING  STATES  THE ENTIRE  RESPONSIBILITY  OF THE
                           PARTIES IN THE CASE OF ANY  CLAIMED  INFRINGEMENT  OR
                           VIOLATION  OF ANY  THIRD  PARTY'S  PATENT  RIGHTS  OR
                           COPYRIGHTS OR UNAUTHORIZED USE OR MISAPPROPRIATION OF
                           ANY THIRD PARTY'S KNOW-HOW.
CONFIDENTIAL                          -19-
7. CONFIDENTIAL INFORMATION.
          7.1     NONDISCLOSURE OF CONFIDENTIAL  INFORMATION.  Neither Party may
                  directly  or  indirectly  publish,  disseminate  or  otherwise
                  disclose,  deliver or make available to any person outside its
                  organization any of the other Party's Confidential Information
                  received hereunder.  Each Party may disclose the other Party's
                  Confidential  Information to persons  within its  organization
                  and to its Affiliates and  sublicensees  who/which have a need
                  to receive such  Confidential  Information in order to further
                  the  purposes of this  Agreement  and  who/which  are bound to
                  protect the confidentiality of such Confidential  Information,
                  as set forth in Section 7.3 below. Each Party may disclose the
                  other  Party's  Confidential  Information  to  a  governmental
                  authority  or by order of a court of  competent  jurisdiction,
                  provided  that such  disclosure  is subject to all  applicable
                  governmental  or  judicial   protection   available  for  like
                  material and  reasonable  advance notice is given to the other
                  Party.
          7.2     USE OF  CONFIDENTIAL  INFORMATION.  Each  Party  shall use the
                  other Party's Confidential Information solely for the purposes
                  contemplated  in this  Agreement or for such other purposes as
                  may be agreed upon by the Parties in writing.
          7.3     AGREEMENTS WITH PERSONNEL AND THIRD PARTIES.  The Parties have
                  or shall  obtain  agreements  with  all  personnel  and  Third
                  Parties who will have access to the other Party's Confidential
                  Information  which impose on such  personnel and Third Parties
                  confidentiality  and  non-use  obligations  which  are no less
                  restrictive than those that are set forth in this Agreement.
           7.4    PUBLICATIONS.
                  7.4.1     RIGHT  TO   PUBLISH.   Any  Party  may  publish  any
                            manuscripts  or  other  scientific  papers  on  work
                            conducted  exclusively  by that  Party  without  the
                            written  consent of the other  Parties.  However,  a
                            Party may not  publish  (or permit a Third  Party to
                            publish) any  manuscript or other  scientific  paper
                            that discloses or uses any Confidential  Information
                            of another Party without first  obtaining that other
                            Party's written consent; and a Party may not publish
                            any manuscript or other  scientific paper that would
                            prejudice   any  Patent   rights  of  another  Party
                            (including,  without limitation,  prospective Patent
                            rights)  without first complying with the provisions
                            of this Section 7.4 and Section 6.1, above.
                   7.4.2    NOTICE AND REVIEW.  In order to balance the Parties'
                            interests  in securing  Patents  covering  the GDF-8
                            Patent Rights with each Party's right to publish any
                            manuscripts  or  other  scientific  papers  on  work
                            relating  directly and exclusively to GDF-8 or GDF-8
                            Products  which  work is  conducted  solely by or on
                            behalf of that Party, prior to the
CONFIDENTIAL                          -20-
                           publication   or  other  public   disclosure  of  any
                           manuscripts  or other form of  disclosure  describing
                           the  results of its work  hereunder,  the  publishing
                           Party shall  provide (a) the data to be  disclosed in
                           that manuscript or other form of public disclosure to
                           the other Party as soon as practicable,  but at least
                           four (4)  weeks  prior  to  intended  submission  for
                           publication or other method of public disclosure, (b)
                           a copy of the draft manuscript to be published,  or a
                           detailed  summary of any other public  disclosure  to
                           the  other  Parties  as soon as  practicable,  but at
                           least two (2) weeks prior to intended  submission for
                           publication or other method of public disclosure, (c)
                           a copy of the  completed  manuscript or other form of
                           public disclosure at the time of submission and (d) a
                           copy of any reviewer's  comments on the manuscript or
                           other form of public  disclosure  with a revised copy
                           thereof at least two (2) weeks prior to publication.
                  7.4.3    DELETION   OF   CONFIDENTIAL   INFORMATION;    PATENT
                           PROTECTION.  A Party may request that the  publishing
                           Party delete from its manuscripts or other scientific
                           papers or other forms of public disclosure  reference
                           to  that   Party's   Confidential   Information.   In
                           addition,  if a Party notifies  another Party that it
                           desires  patent  applications  to be  filed  claiming
                           inventions  that would be  included  within the GDF-8
                           Patent  Rights once filed,  which patent  application
                           contains  information  to be  disclosed by that other
                           Party in a public forum other than in  manuscripts or
                           other  scientific  papers,  the presenting Party will
                           defer such  presentation for a period,  not to exceed
                           thirty (30) additional days, sufficient to permit the
                           Party  with  rights  to  file  any   desired   patent
                           applications to do so.
8. REPRESENTATION AND WARRANTIES.
         8.1    REPRESENTATIONS AND WARRANTIES OF GI AND METAMORPHIX.  As of the
                Effective Date, each of GI and  MetaMorphix  hereby  represents,
                warrants and covenants to the other Party hereto as follows:
                  (a)      it is a  corporation  or entity  duly  organized  and
                           validly existing under the laws of the state or other
                           jurisdiction of incorporation or formation;
                  (b)      the  execution,  delivery  and  performance  of  this
                           Agreement by such Party has been duly  authorized  by
                           all requisite corporate action and do not require any
                           shareholder action or approval;
                  (c)      it has the power and authority to execute and deliver
                           this   Agreement  and  to  perform  its   obligations
                           hereunder;
CONFIDENTIAL                          -21-
                  (d)      the execution, delivery and performance by such Party
                           of this Agreement and its  compliance  with the terms
                           and provisions  hereof does not and will not conflict
                           with or  result  in a breach  of any of the terms and
                           provisions  of or  constitute  a default  under (i) a
                           loan  agreement,   guaranty,   financing   agreement,
                           agreement  affecting a product or other  agreement or
                           instrument  binding or affecting it or its  property;
                           (ii)  the  provisions  of its  charter  or  operative
                           documents  or  bylaws;  or  (iii)  any  order,  writ,
                           injunction  or decree  of any  court or  governmental
                           authority  entered  against it or by which any of its
                           property is bound; and
                  (e)      it  shall at all  times  comply  with all  applicable
                           material  laws  and   regulations   relating  to  its
                           activities under this Agreement.
          8.2     ADDITIONAL REPRESENTATIONS AND WARRANTIES OF GI.
                 8.2.1    PATENT  RIGHTS  AND  KNOW-HOW.  To the  best  of  GI's
                          knowledge,  information and belief,  GI represents and
                          warrants that it owns or has exclusive  (except to the
                          extent  otherwise  provided  in  the  1999  Agreement)
                          rights  to the GI  GDF-8  Patent  Rights  and GI GDF-8
                          Know-How in existence on the Effective Date and/or has
                          the  right to grant  the  licenses  under the GI GDF-8
                          Patent  Rights  and  to  the  GI  GDF-8   Know-How  in
                          existence on the  Effective  Date subject to the terms
                          of this Agreement.  The foregoing  representation  and
                          warranty  shall not be  construed  as a warranty as to
                          the  scope  and/or  validity  of any  claims in the GI
                          GDF-8 Patent Rights.
                  8.2.2   NO CONFLICTING AGREEMENTS.  GI represents and warrants
                          that  the  execution  of,  and   performance   of  the
                          transactions  contemplated by, this Agreement will not
                          conflict  with or result  in any  breach of any of the
                          teens,  conditions or  provisions  of, or constitute a
                          default under, any agreement to which GI is a party or
                          by which GI is bound.
          8.3     ADDITIONAL REPRESENTATIONS AND WARRANTIES OF METAMORPHIX.
                 8.3.1    PATENT   RIGHTS   AND   KNOW-HOW.   To  the   best  of
                          MetaMorphix'   knowledge,   information   and  belief,
                          MetaMorphix  represents  and warrants  that it owns or
                          has exclusive (except to the extent otherwise provided
                          in the 1999 Agreement) rights to the MetaMorphix GDF-8
                          Patent  Rights  and  MetaMorphix   GDF-8  Know-How  in
                          existence on the  Effective  Date and/or has the right
                          to grant  the  licenses  under the  MetaMorphix  GDF-8
                          Patent Rights and to the MetaMorphix GDF-8 Know-How in
                          existence on the  Effective  Date subject to the terms
                          of this Agreement.  The foregoing  representation  and
                          warranty  shall not be  construed  as a warranty as to
                          the  scope  and/or  validity  of  any  claims  in  the
                          MetaMorphix GDF-8 Patent Rights.
CONFIDENTIAL                          -22-
                  8.3.2    NO CONFLICTING AGREEMENTS. MetaMorphix represents and
                           warrants that the execution  of, and  performance  of
                           the transactions contemplated by, this Agreement will
                           not  conflict  with or result in any breach of any of
                           the terms, conditions or provisions of, or constitute
                           a default under,  any agreement to which  MetaMorphix
                           is a party or by which MetaMorphix is bound.
          8.4     REPRESENTATION BY LEGAL COUNSEL.  Each Party hereto represents
                  that it has been  represented  by legal  counsel in connection
                  with this Agreement and acknowledges  that it has participated
                  in the drafting hereof. In interpreting and applying the terms
                  and  provisions of this  Agreement,  the Parties agree that no
                  presumption  shall exist or be implied against the Party which
                  drafted such teens and provisions.
         8.5      MATERIALITY.  EACH PARTY  EXPRESSLY  WAIVES ANY RIGHTS TO SEEK
                  DAMAGES OR OTHER RELIEF FOR BREACH OF THE  REPRESENTATIONS AND
                  WARRANTIES IN SECTIONS 8.1, 8.2 AND 8.3 UNLESS SUCH BREACH HAS
                  A MATERIAL AND ADVERSE EFFECT ON SUCH PARTY.
         8.6     DISCLAIMER. EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, NO
                 PARTY MAKES ANY WARRANTIES,  EXPRESS OR IMPLIED,  INCLUDING BUT
                 NOT LIMITED TO IMPLIED WARRANTIES OR  MERCHANTABILITY,  FITNESS
                 FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
9. PRODUCT LIABILITY INDEMNIFICATION.
          9.1     METAMORPHIX  INDEMNIFICATION.  MetaMorphix agrees to defend GI
                  and   ITS   respective   Affiliates,   sublicensees,   agents,
                  directors,  officers,  employees,  students  and  licensees of
                  rights  to  a  GDF-8  Licensed  Product,  as  applicable  (the
                  "indemnitees")  (other  than  in  settlement  of  a  claim  of
                  infringement),  at  MetaMorphix'  cost and  expense,  and will
                  indemnify and hold harmless such  indemnitees from and against
                  any and all  liabilities,  losses,  costs,  damages,  fees, or
                  expenses  claimed by or paid to a Third Party  attributable to
                  injury  to  persons  or  damage  to  property   (collectively,
                  "Losses")   arising   out  of  or  in   connection   with  the
                  manufacture,  use and/or sale of any GDF-8 Licensed Product by
                  MetaMorphix, its -Affiliates, or sublicensees (other than GI);
                  provided  that  such  Losses  do not  arise  out of the  gross
                  negligence or willful  misconduct of GI or any GI  indemnitee.
                  MetaMorphix's  indemnification  obligations under this Section
                  9.1 shall be  applicable  only to the  extent  not  covered by
                  MetaMorphix's   indemnification  obligations  under  the  1999
                  Agreement.
CONFIDENTIAL                          -23-
         9.2      GI  INDEMNIFICATION.  GI agrees to defend  MetaMorphix and its
                  respective   Affiliates,   permitted   sublicensees,   agents,
                  directors,  officers,  employees,  students  and  licensees of
                  rights  to  a  GDF-8  Licensed  Product,  as  applicable  (the
                  "indemnitees")  (other  than  in  settlement  of  a  claim  of
                  infringement),  at GI's cost and expense,  and will  indemnify
                  and hold  harmless such  indemnitees  from and against any and
                  all  Losses   arising  out  of  or  in  connection   with  the
                  manufacture,  use and/or sale of any GDF-8 Licensed Product by
                  GI, its Affiliates,  or sublicensees (other than MetaMorphix);
                  provided  that  such  Losses  do not  arise  out of the  gross
                  negligence  or  willful   misconduct  of  MetaMorphix  or  any
                  MetaMorphix indemnitee. GI's indemnification obligations under
                  this  Section 9.2 shall be  applicable  only to the extent not
                  covered  by GI's  indemnification  obligations  under the 1999
                  Agreement.
         9.3      NOTICE;  COOPERATION.  In the event of any such  indemnifiable
                  claim,  the  indemnified   Party  shall  promptly  notify  the
                  indemnifying   Party  in   writing   of  the   claim  and  the
                  indemnifying  Party  shall  manage  and  control,  at its sole
                  expense,  the  defense  of the claim and its  settlement.  The
                  indemnified Party shall cooperate with the indemnifying  Party
                  and may, at its option and expense, be represented in any such
                  action or  proceeding.  The  indemnifying  Party  shall not be
                  liable for any  settlements,  litigation  costs,  or  expenses
                  incurred by the  indemnified  Party  without the  indemnifying
                  Party's written consent, such consent to be promptly given and
                  not unreasonably withheld.
         9.4      LIABILITY  LIMITATION.  Neither  GI nor  MetaMorphix  shall be
                  liable for special, incidental or consequential damages or for
                  loss of profit or lost  revenue,  even another  Party had been
                  advised of the possibility of such damages.
         9.5      INSURANCE.  Prior to initial human testing or first commercial
                  sale of any  GDF-8  Product  in any  particular  country  by a
                  Party, such Party shall secure and maintain at its own expense
                  during the term of this Agreement  either self insurance or an
                  insurance  policy or  policies  with an  insurer  or  insurers
                  acceptable to the other  Parties,  in either case,  protecting
                  the  Parties  against  any and  all  risks  typically  insured
                  against  by  businesses  comparable  to the  Party,  including
                  without limitation general and products liability,  arising or
                  occurring  upon or in connection  with each Party's  business.
                  Such policy or policies  shall  include  general and  products
                  liability   coverage  in  an  amount   typically   secured  by
                  businesses  comparable to the Party.  Each Party shall furnish
                  the  other  Party  with   certificates   evidencing  all  such
                  insurance.  Each Party  shall name the other  Party and JHU as
                  additional insured in such policy or policies.
CONFIDENTIAL                          -24-
10.      TERM AND TERMINATION.
         10.1     TERM. This Agreement  shall remain in effect until  terminated
                  in accordance  with the provisions of this Section 10 or until
                  the last to expire of any of the  exclusive  licenses  granted
                  pursuant to this Agreement.
         10.2     TERMINATION FOR BREACH.  In the event that a Party shall be in
                  default of any of its material  obligations  to another  Party
                  hereunder,  and shall fail to remedy any such  default  within
                  sixty (60) days  after  notice  thereof  by the  non-breaching
                  Party to whom such  obligations are owed,  such  non-breaching
                  Party shall, by written notice to the other Party, be entitled
                  to  terminate  the rights it granted  to the  breaching  Party
                  under this  Agreement  and its  obligations  to the  breaching
                  Party under this Agreement. Any such notice shall specifically
                  describe  the  alleged  default and  expressly  state that the
                  non-breaching  Party  intends to  terminate  the rights it has
                  granted to the  breaching  Party under this  Agreement  in the
                  event  that the  breaching  Party  shall  fail to  remedy  the
                  default.  Upon any  termination of this Agreement  pursuant to
                  this Section  10.2,  the Parties  shall not be relieved of any
                  obligations    incurred    prior    to    such    termination.
                  Notwithstanding the foregoing, a termination of this Agreement
                  under  this  Section  10.2  shall  have no  effect on the 1999
                  Agreement  and any  termination  of the 1999  Agreement  under
                  Section 14.2 thereof shall have no effect on this Agreement.
         10.3     SURVIVAL OF OBLIGATIONS;  RETURN OF CONFIDENTIAL  INFORMATION.
                  Notwithstanding   any  termination  of  this  Agreement,   the
                  obligations  of the Parties under  Sections 7, 9, 10.3,  11.1,
                  11.6 and 11.15 as well as under any other  provisions which by
                  their  nature are  intended to survive  any such  termination,
                  shall  survive  and  continue  to  be  enforceable.  Upon  any
                  termination of this Agreement pursuant to Section 10.2 hereof,
                  the breaching Party shall promptly return to the non-breaching
                  Party all  written  Confidential  Information,  and all copies
                  thereof, of the non-breaching Party, which is not covered by a
                  license surviving such termination.
11.      MISCELLANEOUS.
         11.1     PUBLICITY.  No  Party,  nor  any  of  its  Affiliates,   shall
                  originate  any   publicity,   news  release  or  other  public
                  announcement,  written  or oral,  relating  to this  Agreement
                  without the prior written approval of the other Parties, which
                  approval  shall  not  be  unreasonably  withheld,   except  as
                  otherwise  required by law. It is  expressly  understood  that
                  nothing in this Section 11.1 shall prevent a Party from making
                  a disclosure in connection with any required  filings with the
                  Securities and Exchange  Commission or in connection  with the
                  offering of securities or any financing. In addition,  neither
                  GI nor  MetaMorphix  shall use the name of the other  Party in
                  any advertising,
CONFIDENTIAL                          -25-
                  promotional, sales literature or fundraising documents without
                  the prior written consent of such other Party.
         11.2     EXPORT  CONTROL.  The Parties  acknowledge  that the export of
                  technical  data,  materials,  or  products  is  subject to the
                  exporting  Party  receiving the necessary  export licenses and
                  that  the  Parties  cannot  be  responsible   for  any  delays
                  attributable to export controls that are beyond the reasonable
                  control of either Party.  The Parties agree that regardless of
                  any  disclosure  made by the Party  receiving  an export of an
                  ultimate  destination  of any technical  data,  materials,  or
                  products,   the  receiving  Party  will  not  reexport  either
                  directly or  indirectly,  any  technical  data,  material,  or
                  products  without first obtaining the applicable  validated or
                  general license from the United States Department of Commerce,
                  United States Food and Drug  Administration,  and/or any other
                  agency or  department  of the  United  States  Government,  as
                  required.  The  receiving  Party shall  provide the  exporting
                  Party  with any  information,  materials,  certifications,  or
                  other documents which may be reasonably required in connection
                  with such exports under the Export Administration Act of 1979,
                  as amended, its rules and regulations,  the Federal Food, Drug
                  and Cosmetic Act, and other applicable export laws.
         11.3     CONDUCT OF STUDIES. All studies,  research and testing done by
                  or on behalf  of each  Party  under  this  Agreement  shall be
                  performed in strict  compliance  with any applicable  federal,
                  state, or local laws,  rules,  and  regulations  governing the
                  conduct of  studies,  research,  and testing at the site where
                  such studies, research, and testing are being conducted.
         11.4     NO IMPLIED LICENSES. Only the licenses granted pursuant to the
                  express  terms of this  Agreement  shall be of any legal force
                  and effect.  No license rights shall be created by implication
                  or estoppel.
         11.5     NO AGENCY.  Nothing  herein shall be deemed to constitute  any
                  Party as the agent or representative of the other Parties,  or
                  the Parties as joint  venturers  or partners  for any purpose.
                  Each Party shall be an independent contractor, not an employee
                  or partner of the other Parties,  and the manner in which each
                  Party  renders  its  services  under this  Agreement  shall be
                  within its sole discretion.  No Party shall be responsible for
                  the acts or omissions of the other Parties,  and no Party will
                  have  authority to speak for,  represent or obligate the other
                  Parties in any way without  prior written  authority  from the
                  other Party or Parties.
         11.6     NOTICE.  All notices required under this Agreement to be given
                  by one Party to another shall be in writing and shall be given
                  by  addressing  the  same  to  the  other  at the  address  or
                  facsimile  number set forth below,  or at such other addresses
                  or  facsimile  numbers as the  Parties may specify in writing.
                  All notices  shall  become  effective  when  deposited  in the
                  United  States  Mail  with  proper  postage  for  first  class
                  registered or certified mail prepaid, return
CONFIDENTIAL                          -26-
                  receipt  requested,  or  when  delivered  personally,  or,  if
                  promptly  confirmed by mail as provided above, when dispatched
                  by facsimile.
                 If to GI:
                                   Genetics Institute, Inc. ▇▇
                                   ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇,
                                   ▇▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇
                                   Telecopier: (▇▇▇) ▇▇▇-▇▇▇▇
                                   Attn: Legal Department
                 If to MetaMorphix:
                                   MetaMorphix, Inc.
                                   ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇
                                   ▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇ ▇▇▇▇▇
                                   Telecopier: (▇▇▇) ▇▇▇-▇▇▇▇
                                   Attn: President
                 with copies to:
                                    Wyeth
                                    ▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇
                                    ▇▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇.
                                    Telecopier: (▇▇▇) ▇▇▇-▇▇▇▇
                                    Attn: General Counsel
                                    and
                                    ▇▇▇▇▇▇▇ ▇▇▇▇ Guinot & Sandler
                                    ▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ - ▇▇▇▇▇ ▇▇▇▇
                                    ▇▇▇▇▇▇▇▇▇,  ▇▇ ▇▇▇▇▇-▇▇▇▇
                                    Telecopier: (▇▇▇) ▇▇▇-▇▇▇▇
                                    Attn: ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, Esq.
         11.7     ASSIGNMENT.  This  Agreement,  and the rights and  obligations
                  hereunder, may not be assigned or transferred,  in whole or in
                  part, by any Party  without the prior  written  consent of the
                  other Parties, except that (a) upon notice to the other Party,
                  GI may assign this Agreement to an Affiliate controlled by GI,
                  and  MetaMorphix  may assign this  Agreement  to an  Affiliate
                  which is majority  controlled  by  MetaMorphix,  provided that
                  each such Party remains  primarily  liable and/or  responsible
                  for the  performance of such  obligations  and such controlled
                  Affiliate, and provided further that such controlled Affiliate
                  agrees  to be  bound  to the  terms  and  conditions  of  this
                  Agreement  and (b) upon  notice  to the  other  Party,  GI may
                  assign  this   Agreement  in   connection   with  the  merger,
                  consolidation  or  sale  of all or  substantially  all of GI's
                  assets and MetaMorphix may assign this Agreement in connection
                  with the merger, consolidation or sale of all or substantially
                  all of MetaMorphix' assets.
CONFIDENTIAL                          -27-
         11.8     ENTIRE   AGREEMENT.   This  Agreement  and  the  exhibits  and
                  schedules  attached  hereto,  together,  constitute the entire
                  agreement  of the Parties  with regard to its subject  matter,
                  and supersedes all previous  written or oral  representations,
                  agreements   and    understandings    between   the   Parties.
                  Notwithstanding the foregoing,  the Parties hereby acknowledge
                  and agree that the 1999  Agreement  shall remain in full force
                  and effect in  accordance  with the terms and  conditions  set
                  forth therein  except to the extent  expressly  amended hereby
                  and that  this  Agreement  is in  addition  to and  should  be
                  interpreted in light of the rights and  obligations of each of
                  the Parties under the 1999 Agreement.
         11.9     NO  MODIFICATION.  This  Agreement  may be  changed  only by a
                  writing signed by the Parties.
         11.10    HEADINGS.  The headings  contained in this  Agreement  are for
                  convenience  of reference  only and shall not be considered in
                  construing this Agreement.
         11.11    WAIVER.  The  waiver by any Party of a breach or a default  of
                  any provision of this  Agreement by another Party shall not be
                  construed as a waiver of any succeeding  breach of the same or
                  any other  provision,  nor shall any delay or  omission on the
                  part of any Party to  exercise  or avail  itself of any right,
                  power or privilege that it has or may have  hereunder  operate
                  as a waiver of any right, power, or privilege by such Party.
         11.12    SEVERABILITY.  In  the  event  that  any  one or  more  of the
                  provisions  contained in this Agreement shall, for any reason,
                  be  held  to be  invalid,  illegal  or  unenforceable  in  any
                  respect, such invalidity, illegality or unenforceability shall
                  not affect any other  provisions  of this  Agreement,  and all
                  other provisions shall remain in full force and effect. If any
                  of the  provisions of this Agreement is held to be excessively
                  broad   or   invalid,   illegal   or   unenforceable   in  any
                  jurisdiction,  it shall be reformed and  construed by limiting
                  and reducing it so as to be  enforceable to the maximum extent
                  permitted by law in conformance with its original intent.
         11.13    SUCCESSORS AND ASSIGNS.  This Agreement  shall be binding upon
                  and  inure to the  benefit  of the  Parties  hereto  and their
                  successors and permitted assigns.
         11.14    COUNTERPARTS.  This Agreement may be executed in any number of
                  counterparts,  each of which shall be deemed an  original  but
                  all of  which  together  shall  constitute  one and  the  same
                  instrument.
CONFIDENTIAL                          -28-
         11.15    APPLICABLE LAW. This Agreement shall in all events and for all
                  purposes be governed by, and construed in accordance with, the
                  law of the State of Maryland  without  regard to any choice of
                  law principle that would dictate the application of the law of
                  another jurisdiction.
                  IN WITNESS  WHEREOF,  duly-authorized  representatives  of the
parties have signed this  Agreement as a document under seal as of the Effective
Date.
GENETICS INSTITUTE, LLC           METAMORPHIX,INC.
By: /s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇▇           By:      /s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇▇
         ▇▇▇▇▇▇ ▇. ▇▇▇▇▇                   ▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇▇▇, Ph.D.
         Vice President                    President and Chief Executive Officer
CONFIDENTIAL                          -29-
                                                EXHIBIT 1.2.10
                                             GI EXCLUDED PRODUCTS
                                             --------------------
                                          None as of Effective Date.
CONFIDENTIAL
                                 EXHIBIT 1.2.12
                             GI GDF-8 PATENT RIGHTS
                             ----------------------
--------------------------------------------------------------------------------
   WYETH         PATENT/APP #      TITLE        COUNTRY       STATUS      FILED
  DOCKET #
--------------------------------------------------------------------------------
    ***               ***          ***             US         Filed     02/08/02
--------------------------------------------------------------------------------
    ***               ***          ***            PCT         Filed     02/08/02
--------------------------------------------------------------------------------
    ***               ***          ***         Argentina      Filed     02/08/02
--------------------------------------------------------------------------------
    ***               ***          ***           Chile        Filed     02/07/02
--------------------------------------------------------------------------------
    ***               ***          ***           Taiwan       Filed     02/07/02
--------------------------------------------------------------------------------
    ***               ***          ***         Venezuela      Filed     02/08/02
                                                   I
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
    ***                            ***             US         Filed     09/26/02
--------------------------------------------------------------------------------
    ***                            ***            PCT         Filed     09/26/02
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
    ***               ***          ***             US         Filed     02/21/02
--------------------------------------------------------------------------------
    ***               ***          ***             US         Filed     02/21/02
--------------------------------------------------------------------------------
CONFIDENTIAL
                                 EXHIBIT 1.2.15
                            JOINT GDF-8 PATENT RIGHTS
                           None as of Effective Date.
CONFIDENTIAL
                                 EXHIBIT 1.2.16
                          METAMORPHIX EXCLUDED PRODUCTS
                            None as of Effective Date
CONFIDENTIAL
                                 EXHIBIT 1.2.18
                         METAMORPHIX GDF-8 PATENT RIGHTS
                         -------------------------------
-------------------------------------------------------------------------------
 PATENT / APP #              TITLE                COUNTRY            STATUS
-------------------------------------------------------------------------------
      ***             ***                           US               Issued
-------------------------------------------------------------------------------
      ***             ***                        Argentina          Pending
-------------------------------------------------------------------------------
      ***             ***                         Brazil            Pending
-------------------------------------------------------------------------------
      ***             ***                         Canada            Pending
-------------------------------------------------------------------------------
      ***             ***                         Europe            Pending
-------------------------------------------------------------------------------
      ***             ***                          Japan            Pending
-------------------------------------------------------------------------------
      ***             ***                         Mexico            Pending
-------------------------------------------------------------------------------
      ***             ***                       New Zealand         Pending
-------------------------------------------------------------------------------
      ***             ***                      South Africa          Issued
-------------------------------------------------------------------------------
      ***             ***                           US              Pending
-------------------------------------------------------------------------------
      ***             ***                          World           Published
-------------------------------------------------------------------------------
      ***             ***                          World           Published
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
      ***             ***                           US              Pending
-------------------------------------------------------------------------------
      ***             ***                         Canada            Pending
-------------------------------------------------------------------------------
      ***             ***                         Europe            Pending
-------------------------------------------------------------------------------
      ***             ***                          Japan            Pending
-------------------------------------------------------------------------------
      ***             ***                           US              Pending
-------------------------------------------------------------------------------
      ***             ***                          World            Pending
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
      ***             ***                           US              Pending
-------------------------------------------------------------------------------
      ***             ***                        Australia          National
-------------------------------------------------------------------------------
      ***             ***                         Brazil            Pending
-------------------------------------------------------------------------------
      ***             ***                         Canada            Pending
-------------------------------------------------------------------------------
      ***             ***                          China           Published
-------------------------------------------------------------------------------
      ***             ***                         Europe           Published
-------------------------------------------------------------------------------
      ***             ***                          Japan            National
                                                                     Phase
-------------------------------------------------------------------------------
CONFIDENTIAL
                                 EXHIBIT 1.2.18
                         METAMORPHIX GDF-8 PATENT RIGHTS
                         -------------------------------
-------------------------------------------------------------------------------
 PATENT / APP #              TITLE                COUNTRY            STATUS
-------------------------------------------------------------------------------
      ***              ***                        Mexico            Pending
-------------------------------------------------------------------------------
      ***              ***                      New Zealand         National
                                                                     Phase
-------------------------------------------------------------------------------
      ***              ***                         World            Pending
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
      ***              ***                          US               Issued
-------------------------------------------------------------------------------
      ***              ***                       Australia          Pending
-------------------------------------------------------------------------------
      ***              ***                        Canada            Pending
-------------------------------------------------------------------------------
      ***              ***                        Europe            Pending
--------------------------------------------------------------------------------
      ***              ***                         US               Pending
--------------------------------------------------------------------------------
      ***              ***                        World             National
                                                                     Phase
--------------------------------------------------------------------------------
CONFIDENTIAL