1. Verna and Marrs McLean Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, Texas 77030, United States
2. Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas 77030, United States
3. Department of Pathology, Baylor College of Medicine, Houston, Texas 77030, United States
4. Department of Biology and Biochemistry, University of Houston, Houston, Texas 77205, United States
5. Center for Drug Discovery, Baylor College of Medicine, Houston, Texas 77030, United States
6. Department of Chemistry, University of Houston, Houston, Texas 77204, United States