1. Center
for Integrative Chemical Biology and Drug Discovery, Division of Chemical
Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
2. Structural
Genomics Consortium, University of Toronto, Toronto, Ontario M5G 1L7, Canada
3. Princess
Margaret Cancer Centre and Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 2M9, Canada