1. Department of Biochemistry; University at Buffalo; Buffalo NY 14214 USA
2. Department of Microbiology and Immunology; University at Buffalo; Buffalo NY 14214 USA
3. Center for Single Molecule Biophysics; University at Buffalo; Buffalo NY 14214 USA
4. Department of Biochemistry and Molecular Biology; University of Arkansas for Medical Sciences; slot 516 Little Rock AR 72205 USA
5. Department of Pathology and Anatomical Sciences; University at Buffalo; Buffalo NY 14214 USA