SEATTLE--(BUSINESS WIRE)--ZymoGenetics, Inc. (NASDAQ: ZGEN) today announced the initiation of a Phase 2 clinical trial of PEG-Interferon lambda (IL-29) and ribavirin in treatment-naïve patients with chronic hepatitis C virus (HCV) infection (the “EMERGE” study). The first patient has been dosed in the study, triggering a $70 million milestone payment to ZymoGenetics from Bristol-Myers Squibb Company (NYSE:BMY), pursuant to the terms of a previously announced collaboration agreement.