1. Department of Pharmacology, University of Texas Southwestern Medical Center, 6001 Forest Park Road, Dallas, TX 75390, USA.
2. Department of Internal Medicine, Yale University School of Medicine, New Haven, CT 06510, USA.
3. Department of Nutrition, Case Western Reserve University, Cleveland, Ohio, 44106, USA.
4. Laboratory of Structural Sciences, Van Andel Research Institute, 333 Bostwick Avenue Northeast, Grand Rapids, MI 49503, USA.
5. Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT 06510, USA.
6. Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
7. Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.