1. NIH Chemical Genomics Center, National Human Genome Research Institute, National Institutes of Health, 9800 Medical Center Drive, MSC 3370 Bethesda, Maryland 20850
2. Dana Farber Cancer Institute, Boston, Massachusetts 02115
3. Department of Systems Biology, Harvard Medical School, Boston, Massachusetts 02115
4. Structural Genomics Consortium, University of Toronto, Toronto, Ontario, Canada M5G 1L5
5. Department of Pharmacology, University of Toronto, Toronto, Ontario, Canada M5S 1A8
6. Division of Signal Transduction, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02115