1. Department of Chemistry, Center for Structural Biology, Center in Molecular Toxicology, and Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee 37235, Department of Biochemistry, Center for Structural Biology, Center in Molecular Toxicology, School of Medicine, Vanderbilt University, Nashville, Tennessee 37232, Eppley Institute for Research in Cancer, University of Nebraska Medical Center, Omaha, Nebraska 68198-6805, Department of Pharmaceutical Sciences, University of Nebraska...