1. Department
of Chemistry, McGill University, 801 Sherbrooke Street West, Montréal, Québec H3A 0B8, Canada
2. Department
of Biochemistry and Structural Biology, University of Texas Health Science Center, 7703 Floyd Curl Drive, San Antonio, Texas 78229, United States
3. Departments
of Biochemistry and Biomolecular Chemistry, University Of Wisconsin—Madison, 433 Babcock Drive, Madison, Wisconsin 53706, United States
4. Department
of Veterans Affairs, South Texas Veterans Health Care System, San Antonio, Texas 78229, United States