1 Department of Developmental and Cell Biology, School of Biological Sciences, University of California, Irvine, Irvine, California, USA; Sue and Bill Gross Stem Cell Research Center, University of California, Irvine, Irvine, California, USA.
2 Department of Developmental and Cell Biology, School of Biological Sciences, University of California, Irvine, Irvine, California, USA; Sue and Bill Gross Stem Cell Research Center, University of California, Irvine, Irvine, California, USA; NSF-Simons Center for Multiscale Cell Fate Research, University of California, Irvine, Irvine, California, USA; Center for Complex Biological Systems, University of California, Irvine, Irvine, California, USA. Electronic address: [email protected].