Affiliation: | 1Structural Biology Program, Sloan-Kettering Institute, New York, New York 10065, USA;2Microbiology and Immunology Department, Weill Cornell Medical College, New York, New York 10065, USA;3Molecular Biology Program, Sloan-Kettering Institute, New York, New York 10065, USA;4Howard Hughes Medical Institute, Structural Biology Program, Sloan-Kettering Institute, New York, New York 10065, USA |