1. Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA.
2. Program in Biophysics, Stanford University, Stanford, CA 94305, USA.
3. Department of Molecular and Cell Biology, California Institute for Quantitative Biosciences (QB3), University of California, Howard Hughes Medical Institute, Department of Chemistry, and the Innovative Genomics Institute, University of California, Berkeley, Berkeley, CA 94720, USA.
4. MBIB Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94710, USA.
5. Gladstone Institutes, University of California, San Francisco, San Francisco, CA 94158, USA.
6. Department of Applied Physics, Stanford University, Stanford, CA 94305, USA.