1. Institute for Quantitative Biosciences (QB3), University of California, Berkeley, CA 94720, USA.
2. Department of Physics, University of California, Berkeley, CA 94720, USA.
3. Department of Chemistry, University of California, Berkeley, CA 94720, USA.
4. Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA.
5. Howard Hughes Medical Institute, University of California, Berkeley, CA 94720, USA.