1. Department of Biology, Calibr, The Scripps Research Institute, La Jolla, CA 92037, USA.
2. Department of Chemistry and Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.
3. Department of Urology, Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA.
4. Department of Medicine, Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA.
5. Department of Orthopedic Surgery, Scripps MD Anderson Cancer Center, La Jolla, CA 92093, USA.