1. Structural Genomics Consortium, University of Toronto, 101 College Street, Room 839, MaRS Centre, South Tower, Toronto, ON, Canada M5G 1L7
2. Center for Advanced Research in Biotechnology, University of Maryland Biotechnology Institute, Rockville, MD 20850, U.S.A.
3. Department of Pharmacology, University of Toronto, 101 College Street, Room 839, MaRS Centre, South Tower, Toronto, ON, Canada M5G 1L7