1. Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48019, United States
2. Program in Chemical Biology, University of Michigan, Ann Arbor, Michigan 48109, United States
3. Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
4. Department of Medicinal Chemistry, College of Pharmacy, University of Michigan, Ann Arbor, Michigan 48109, United States
5. University of Michigan Medical School, Ann Arbor, Michigan 48109, United States
6. Department of Biophysics, University of Michigan, Ann Arbor, Michigan 48109, United States