1. Department
of Pharmaceutical Chemistry, University of California, San Francisco, 600 16th Street, San Francisco, California 94158, United States,
2. Chemistry
and Chemical Biology Graduate Program, University of California, San Francisco, 600 16th Street, Room 522, San Francisco, California 94158, United States,
3. Medical
Scientist Training Program, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, California 94143, United States
4. UC Berkeley−UCSF Group in Bioengineering, 1700 Fourth Street, Room 216, San Francisco, California 94158, United States,
5. UCSF Bioengineering and Therapeutic Sciences, 1700 Fourth Street, Room 216B, San Francisco, California 94158, United States
6. Laboratory
of Stem Cell Bioengineering, Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, Station
15, Building Al 1106, CH-1015 Lausanne, Switzerland
7. Life
Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron
Road, Berkeley, California 94720, United States