Maxygen Announces Achievement of Milestone in Alliance With Roche

March 30, 2005

Maxygen announced that it has earned a significant milestone in its collaboration with Roche to develop improved interferon alpha protein therapeutics to treat hepatitis C virus (HCV) and hepatitis B virus (HBV) infections. Maxygen and Roche are currently completing late stage preclinical studies and GMP manufacturing and are on track to file an investigational new drug application in preparation for Phase I clinical trials in 2006.

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