1 Department of Molecular, Cell and Developmental Biology, University of California at Los Angeles, Los Angeles, California, USA.
2 Innovative Genomics Institute, University of California, Berkeley, California, USA.
3 Howard Hughes Medical Institute, University of California, Berkeley, California, USA.
4 California Institute for Quantitative Biosciences (QB3), University of California, Berkeley, California, USA.
5 University of California, Berkeley-University of California, San Francisco Graduate Program in Bioengineering, University of California, Berkeley, California, USA.
6 Howard Hughes Medical Institute, University of California at Los Angeles, Los Angeles, California, USA.