1. *Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton L8N 3Z5, Canada;
2. National Microbiology Laboratory, Canadian Science Centre for Human and Animal Health, Winnipeg R3E 3R2, Canada;
3. Departments of Biochemistry and Molecular Biology and Chemistry, University of Massachusetts, Amherst, MA 01003;
4. Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, United Kingdom; and
5. Ontario Cancer Institute and Department of Medical Biophysics, University of Toronto, Toronto M5G 2M9, Canada