1. Department of Biological Sciences, Bridge Institute, USC Michelson Center for Convergent Bioscience, University of Southern California, Los Angeles, CA 90089, USA.
2. Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA.
3. Larry Hillblom Islet Research Center, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA.
4. Department of Chemistry, Bridge Institute, USC Michelson Center for Convergent Bioscience, University of Southern California, Los Angeles, CA 90089, USA.
5. Howard Hughes Medical Institute (HHMI), California Institute of Technology, Pasadena, CA 91125, USA.