1. Department of Microbial Pathogenesis, School of Dentistry, University of Maryland, Baltimore, Maryland 21201, United States
2. Department of Pathology, School of Medicine, University of Maryland, Baltimore, Maryland 21201, United States
3. Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
4. Genome British Columbia Proteomics Centre, University of Victoria, Victoria, British Columbia V8Z 7Z8, Canada
5. Chemistry Department, United States Naval Academy, Annapolis, Maryland 21402, United States