1. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208, United States
2. Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, 220141 Minsk,
Kuprevicha 5, Belarus
3. Structural
Genomics Consortium, University of Toronto, 101 College Street, Toronto,
Ontario M5G 1L7, Canada