1. Department of Periodontics, Endodontics and Dental Hygiene, Health Sciences Center, University of Louisville, Louisville, KY 40292, U.S.A.
2. Department of Chemistry and Biochemistry and Centre for Structural and Functional Genomics, Concordia University, Montreal, Quebec, H3G 1M8, Canada
3. Department of Biochemistry and Molecular Biology, Health Sciences Center, University of Louisville, Louisville, KY 40292, U.S.A.