Schedule of Purchasers Clause Samples

Schedule of Purchasers. The Schedule of Purchasers, which serves as Exhibit A to the Purchase Agreement, is hereby replaced in its entirety to read as set forth in Exhibit A attached hereto.

Schedule of Purchasers. 1 SEC................................................................................ 17

Schedule of Purchasers. (1) (2) (3) (4) (5) Purchaser Purchase Price Original Principal Amount of Notes Address and Facsimile Number Legal Representative’s Address and Facsimile Number TOTAL $ 100,000,000 $ 100,000,000

Schedule of Purchasers. PURCHASER NUMBER OF SHARES --------- ---------------- Caduceus Capital Trust 35,000 Caduceus Capital II, L.P. 48,500 PW Eucalyptus Fund, LLC 75,000 PW Eucalyptus Fund, Ltd. 5,000 Finsbury Worldwide Pharmaceutical Trust 36,500 Eato▇ ▇▇▇▇▇ ▇▇▇ldwide Health Sciences Portfolio 200,000 DWS Investment 250,000 Alliance Select Investors Series-Biotechnology Portfolio 200,000 Berg▇▇ ▇▇▇ll Company Growth Fund 150,000 Berg▇▇ ▇▇▇ - Small Company Growth Fund 500 Berg▇▇ ▇▇▇ Generation Fund 37,250 Berg▇▇ ▇▇▇ - New Generation Fund 250 Berg▇▇ ▇▇▇ Cap Growth Fund 12,000 SMALLCAP World Fund, Inc. 200,000 The Kauf▇▇▇▇ ▇▇▇d 200,000 Lone Balsam, L.P. 15,800 Lone Sequoia, L.P. 13,200 Lone Spruce, L.P. 7,200 Lone Cypress, Ltd. 163,800 Baystar International, LTD 37,500 Baystar Capital, L.P. 87,500 UBS O'Co▇▇▇▇ ▇▇▇ f/b/o UBS Global Equity Arbitrage Master Limited 100,000 Galleon Healthcare Offshore, Ltd. 42,500 Galleon Healthcare Partners, L.P. 42,500 Phoenix - Enge▇▇▇▇ ▇▇▇ll & Mid-Cap Growth Fund 45,780 Phoenix - Enge▇▇▇▇ ▇▇▇ll Cap Fund 39,000 The Phoenix Edge Series Fund: Phoenix - Enge▇▇▇▇ ▇▇▇ll & Mid-Cap Growth Series 220 S.A.C. Capital Associates, LLC 45,000

Schedule of Purchasers. Number Aggregate Purchaser of Shares Consideration --------- --------- ------------- SERIES A Warburg, Pinc▇▇ ▇▇▇tures, L.P. 3,600,000 $6,300,000.00 CLOSING G-Fund L.L.C. 400,000 700,000.00 --------- ------------- TOTAL 4,000,000 $7,000,000.00 SERIES B Warburg, Pinc▇▇ ▇▇▇tures, L.P. 2,571,429 $5,400,000.90 CLOSING G-Fund L.L.C. 285,714 599,999.40 --------- ------------- TOTAL 2,857,143 $6,000,000.30 SERIES C Warburg, Pinc▇▇ ▇▇▇tures, L.P. 2,857,143 $9,000,000.40 CLOSING G-Fund L.L.C. 317,460 999,999.00 --------- ------------- TOTAL 3,174,603 $9,999,999.40

Schedule of Purchasers. 24 Schedules and Exhibits ---------------------- Schedule of Purchasers Exhibit A Certificate of Designations Exhibit B Certificate of Amendment Exhibit C Certificate of Incorporation iii PURCHASE AGREEMENT THIS PURCHASE AGREEMENT is made as of September 25, 1996 (this "Agreement") by and among United USN, Inc., a Delaware corporation (the "Company"), CIBC Wood Gundy Ventures, Inc., a Delaware corporation ("CIBC"), Chase Capital Partners (as successor to Chemical Venture Capital Associates, a California limited partnership ("Chemical")), a New York general partnership ("Chase"), ▇▇▇▇▇▇▇ Venture Partners IV - Direct Fund, L.P., a Delaware limited partnership ("▇▇▇▇▇▇▇"), BT Capital Partners, Inc., a Delaware corporation ("BT"), Northwood Capital Partners LLC, a New York limited liability company ("Northwood Capital"), Northwood Ventures, a New York limited partnership ("Northwood Ventures"), and Enterprises & Transcommunications, L.P., a Delaware limited partnership ("Prime" and collectively with CIBC, Chase, Hancock, Northwood Capital and Northwood Ventures, the "Purchasers"). Unless otherwise defined herein, capitalized terms used herein are defined in Section 6 hereof. The Company, CIBC, Chemical and ▇▇▇▇▇▇▇ are parties to a Purchase Agreement dated as of April 20, 1994, as amended as of June 10, 1994, and November 1, 1994 (as so amended, the "First Purchase Agreement"), pursuant to which CIBC, Chemical and ▇▇▇▇▇▇▇ purchased from the Company certain shares of the Company's Series A 10% Senior Cumulative Preferred Stock, par value $1.00 per share (the "Series A Preferred Stock"), and Common Stock, par value $.01 per share (the "Common Stock"). The Purchasers are also parties to a certain Purchase Agreement dated as of June 22, 1995 (as amended, the "Second Purchase Agreement"), pursuant to which the Purchasers purchased from the Company certain shares of the Company's Series A-2 10% Senior Cumulative Preferred Stock, par value $1.00 per share the "Series A-2 Preferred Stock"), and Common Stock. The Purchasers desire to purchase from the Company and the Company desires to sell to the Purchasers shares of the Company's 9.0% Cumulative Convertible Pay-In- Kind Preferred Stock, par value $1.00 per share (the "9% Preferred Stock").

Schedule of Purchasers. The Schedule of Purchasers is hereby amended to insert: "The ▇▇▇▇▇▇▇▇ and ▇▇▇▇▇▇▇▇ Company, ▇▇▇ ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇, ▇▇ ▇▇▇▇▇. Series B - 71429."

Schedule of Purchasers. Exhibit B . . .

Schedule of Purchasers. NAME NUMBER OF NUMBER OF SHARES WARRANT SHARES PURCHASE PRICE --------------------------------------------------------------------------------------------- Banner Partners Minaret 675 150,000 $675,000 --------------------------------------------------------------------------------------------- Will▇▇▇ ▇. ▇▇▇▇▇▇, ▇▇I Revocable Trust 34 7,556 $34,000 --------------------------------------------------------------------------------------------- Fred ▇. ▇▇▇▇▇▇▇ 45 10,000 $45,000 --------------------------------------------------------------------------------------------- Micro Cap Partners, L.P. 1,426 316,889 $1,426,000 --------------------------------------------------------------------------------------------- Micro-Mousse Partners, L.P. 174 38,667 $174,000 --------------------------------------------------------------------------------------------- UBTI Free, L.P. 146 32,444 $146,000 --------------------------------------------------------------------------------------------- Palo Alto Crossover Fund, L.P. 500 111,111 $500,000 --------------------------------------------------------------------------------------------- Anvil Investment Associates, L.P. 880 195,556 $880,000 --------------------------------------------------------------------------------------------- Ashford Capital Partners, L.P. 1,000 222,222 $1,000,000 --------------------------------------------------------------------------------------------- TOTAL 4,880 1,084,445 $4,880,000.00 --------------------------------------------------------------------------------------------- SCHEDULE 2.4 Common Stock 21,701,000 Series A Preferred(1) 411,290 Series B Preferred(2) 5,000 Employee Options(3) 4,039,338 Warrants 1,409,418