1. Department of Peptide Therapeutics, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
2. Department of Biological Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
3. Department of Protein Analytical Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States