1. Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, USA
2. Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, USA
3. Department of Microbiology, University of Chicago, Chicago, Illinois 60637, USA
4. Department of Medicinal Chemistry, University of Minnesota, 208 Harvard Street SE, Minneapolis, Minnesota 55454, USA
5. Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, 321 Church St SE, Minneapolis, Minnesota 55454, USA
6. Department of Pharmacology, University of Minnesota, 321 Church St SE, Minneapolis, Minnesota 55454, USA