Affiliation: | 3. Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, Ontario, Canada, M5G 1X5;;4. Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada, M5S 1A8;;5. The Institute of Cancer Research, Divisions of Structural Biology and Cancer Biology, London, UK, SW7 3RP;;6. NE-CAT APS, Building 436E, Argonne National Lab, 9700 S. Cass Avenue, Argonne, Illinois 60439; |