1. Center for Structural Biology, Vanderbilt University, Nashville, United States
2. Department of Chemistry, Vanderbilt University, Nashville, United States
3. Institute for Drug Discovery, Leipzig University, Leipzig, Germany
4. Department of Pharmacology, Northwestern University Feinberg School of Medicine, Chicago, United States
5. Department of Biochemistry, Vanderbilt University, Nashville, United States
6. Department of Pharmacology, Vanderbilt University, Nashville, United States