1. Department of Chemistry, University of California, Berkeley, California 94720, United States
2. Department of Molecular and Cell Biology, University of California, Berkeley, California 94720, United States
3. Gladstone Institutes, San Francisco, California 94158, United States
4. Department of Cellular and Molecular Pharmacology, School of Medicine, University of California, San Francisco, California 94158, United States
5. Howard Hughes Medical Institute, University of California, Berkeley, California 94720, United States
6. Innovative Genomics Institute, University of California, Berkeley, California 94720, United States
7. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States