1. Life
Sciences Institute and the Departments of Pharmacology and Biological
Sciences, University of Michigan, Ann Arbor, Michigan 48109, United States
2. Structural
Genomics Consortium, University of Oxford, Old Road Campus Research Building,
Roosevelt Drive, Oxford OX3 7DQ, United Kingdom
3. Nuffield
Department of Clinical Medicine, Target Discovery Institute, University of Oxford, NDM Research Building, Roosevelt Drive, Oxford OX3 7FZ, United Kingdom