1. Chemical Biology Doctoral Program, University of Michigan, Ann Arbor, MI 48109, USA.
2. Department of Cancer Biology, The Scripps Research Institute, Jupiter, FL 33458, USA.
3. Life Sciences Institute and Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
4. Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.
5. Department of Biophysics, University of Michigan, Ann Arbor, MI 48109, USA.
6. Center for Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109, USA.