1. Department of Chemistry and Biochemistry, University of Notre Dame, 236 Cavanaugh Drive, Notre Dame, Indiana 46556, United States
2. Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
3. Department of Microbial Pathogenesis, University of Maryland—Baltimore, 650 West Baltimore Street, Room 8203, Baltimore, Maryland 21201, United States
4. Department of Genome Sciences, University of Washington, Foege Building S-250, Box 355065, 3720 15th Ave NE, Seattle, Washington 98195, United States