1. Department of Pharmacology & Toxicology, The University of Texas Medical Branch, 3.330 Basic Science Building, 301 University Boulevard, Galveston, Texas 77555, United States
2. Sealy Center for Structural Biology & Molecular Biophysics, The University of Texas Medical Branch, 301 University Boulevard, Galveston, Texas 77555, United States
3. Department of Biochemistry & Molecular Biology, The University of Texas Medical Branch, 301 University Boulevard, Galveston, Texas 77555, United States