1. Department of Biochemistry and Biomedical Sciences, McMaster University, Health Sciences Centre, Hamilton, ON L8S 3L8, Canada
2. Structural Genomics Consortium, University of Toronto, Toronto, ON N5G 1L7, Canada
3. Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 3P4, Canada
4. Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo 05508-000, Brazil