1. Department of Pharmacology (S.D., R.G., T.C., H.H.S.), New York University School of Medicine, New York, New York 10016;
2. Structural Genomics Consortium (M.S.), Banting Building, University of Toronto, Toronto, Ontario, Canada M5G 1L5;
3. Department of Dermatology (M.T.-C.), Weill Medical College of the Cornell University, New York, New York 10021