1. The Hormel Institute, University of Minnesota, Austin, Minnesota 55912, United States
2. Department of Molecular Medicine, The Herbert Wertheim UF Scripps Institute, Jupiter, Florida 33458, United States
3. Department of Chemistry, State University of New York at Cortland, Cortland, New York 13045, United States
4. Department of Microbiology and Immunology, Stony Brook University, Stony Brook, New York 11790, United States