1. Pharmaceutical Sciences Division, University of Wisconsin−Madison, 777 Highland Avenue, Madison, Wisconsin 53705, United States
2. Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida 32611, United States
3. Department of Cell and Regenerative Biology, University of Wisconsin−Madison, 1111 Highland Avenue, Madison, Wisconsin 53705, United States
4. Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
5. Department of Bacteriology, University of Wisconsin−Madison, 1550 Linden Drive, Madison, Wisconsin 53706, United States
6. The Small Molecule Screening Facility, University of Wisconsin−Madison, 600 Highland Avenue, Madison, Wisconsin 53792, United States