1. Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
2. Department of Microbiology, Immunology and Physiology, Meharry Medical College, Nashville, Tennessee 37208, United States
3. Vanderbilt Center for Neuroscience Drug Discovery, Franklin, Tennessee 37067, United States
4. Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
5. Laboratório de Biologia Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, RJ 21040-360, Brazil
6. Center for Structural Biology, Vanderbilt University, Nashville, Tennessee 37232, United States