1. Life Sciences Institute; University of Michigan; 210 Washtenaw Ave.; Ann Arbor MI 48109-2216 USA
2. Center for Chemical Genomics; University of Michigan; 210 Washtenaw Ave.; Ann Arbor MI 48109-2216 USA
3. Department of Chemistry and Medicinal Chemistry; University of Michigan; 210 Washtenaw Ave.; Ann Arbor MI 48109-2216 USA
4. Department of Microbiology and Immunology; University of Michigan; 210 Washtenaw Ave.; Ann Arbor MI 48109-2216 USA
5. Department of Chemistry; University of Michigan; 210 Washtenaw Ave.; Ann Arbor MI 48109-2216 USA