1. Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94143, USA.
2. Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA.
3. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
4. Department of Chemistry, Brown University, Providence, RI 02912, USA.
5. Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA.
6. California Institute for Quantitative Biosciences, University of California, Berkeley, Berkeley, CA 94720, USA.
7. Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA.
8. Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, CA 94720, USA.
9. Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
10. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
11. Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
12. Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
13. Institute for Medical Engineering & Science, Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
14. Department of Molecular Biology, Cell Biology, and Biochemistry, Brown University, Providence, RI 02912, USA.