Affiliation: | 1. Department of Early Stage Cell Culture, Genentech Inc., 1 DNA Way, South San Francisco, California 94080;2. Department of Molecular Biology, Genentech Inc., 1 DNA Way, South San Francisco, California;3. Department of Analytical Development and Quality Control, Genentech Inc., 1 DNA Way, South San Francisco, California;4. (650) 225‐6446(650) 225‐2006 |