1. Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA.
2. Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA.
3. Institute for Pharmacology and Toxicology, University of Würzburg, 97078 Würzburg, Germany.
4. Institute of Metabolism and Systems Research, University of Birmingham, Birmingham B15 2TT, UK.
5. Centre of Membrane Proteins and Receptors, University of Birmingham, Birmingham B15 2TT, UK.
6. Shenzhen Bay Laboratory and Laboratory of Computational Chemistry and Drug Design, Peking University Graduate School, Shenzhen 518055, China.
7. Departments of Chemistry and Biochemistry and Pharmacology, University of California San Diego, La Jolla, CA 92093, USA.