---------------------------------------------- 1. Name and Address of Reporting Person: 2. Issuer Name and Ticker or Trading Symbol: ZymoGenetics, Inc. (ZGEN) Warburg, Pincus Equity Partners, L.P. 466 Lexington Avenue, New York, New York 10017...Exhibit 99.4 • September 17th, 2007 • Warburg Pincus Equity Partners Lp • Biological products, (no disgnostic substances)
