1. Department of Cellular and Molecular Pharmacology, QB3 Institute, University of California San Francisco CA USA
2. Department of Biochemistry and Biophysics, Cancer Research Institute, University of California San Francisco CA USA
3. UCSC Chemical Screening Center, University of California Santa Cruz CA USA
4. Department of Genetics, Harvard University Medical School, and Division of Genetics, Howard Hughes Medical Institute, Brigham and Women's Hospital Boston MA USA
5. MRC Laboratory of Molecular Biology Cambridge UK
6. Department of Chemistry and Biochemistry, University of California Santa Cruz CA USA