1. Institute of Parasitology, McGill University, Ste. Anne de Bellevue, Quebec H9X 3 V9, Canada
2. Molecular Recognition Section, Laboratory of Bioorganic Chemistry, NIDDK, National Institutes of Health, 9000, Rockville Pike, Bethesda, Maryland 20892, United States
3. Department of Biochemistry, McGill University, Montreal H3G 1Y6, Quebec, Canada