1. Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
2. Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
3. Departments of Biochemistry and Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
4. Department of Microbiology and Cell Science, University of Florida, Gainesville, Florida 32611, United States
5. University of Florida Genetics Institute, Gainesville, Florida 32611, United States