1. SUNY Microbiology and Immunology, Center for Single Molecule Biophysics, University at Buffalo; 321 Cary Hall, 3435 Main St Buffalo New York 14214
2. Department of Microbiology and Immunology; University at Buffalo; Buffalo New York
3. Department of Biochemistry; University at Buffalo; Buffalo New York
4. Department of Pharmaceutical Sciences; University of Nebraska Medical Center; Omaha Nebraska 68198-6025