1. Department of Chemistry, University of California, Berkeley, Berkeley, CA, USA.
2. Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA, USA.
3. Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, CA, USA.
4. Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, USA.
5. California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, Berkeley, CA, USA.