1. Department of Biochemistry and Molecular Biology, Brody School of Medicine, East Carolina University, Greenville, North Carolina27834, United States
2. Agile Sciences Inc., 617 Hutton Street, Raleigh, North Carolina27606, United States
3. Department of Microbiology and Immunology, Brody School of Medicine, East Carolina University, Greenville, North Carolina27834, United States
4. Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana46556, United States