1. Department of Physiology and Biophysical Sciences, State University of New York at Buffalo, Buffalo, NY 14214
2. Trinity College of Arts and Sciences, Duke University, Durham, NC 27708
3. Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104
4. Laboratory of Molecular Physiology and Biophysics, Hauptman-Woodward Medical Research Institute, Buffalo, NY 14203
5. Department of Medicinal Chemistry, University of Florida, Gainesville, FL 32610
6. Marine Biological Cryo-EM Center, Laoshan Laboratory, Qingdao, Shandong 266200, China