1. Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada
2. Li Ka Shing Institute of Virology, University of Alberta, Edmonton, AB T6G 2E1, Canada
3. Li Ka Shing Applied Virology Institute, University of Alberta, Edmonton, AB T6G 2E1, Canada
4. Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, AB T6G 2E1, Canada
5. Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2, Canada