1. Department of Biochemistry and Biophysics, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94158, United States
2. Chemistry and Chemical Biology Graduate Program, University of California San Francisco, Genentech
Hall, 600 16th Street, San Francisco, California 94143, United States
3. Graduate Group in Biophysics, University of California San Francisco, Genentech Hall, 600 16th Street, San Francisco, California 94143, United States