1. State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin 300350, China.
2. College of Life Sciences, Nankai University, Tianjin 300071, China.
3. Department of Biophysics and Department of Pathology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China.
4. Center of Cryo Electron Microscopy, Zhejiang University School of Medicine, Hangzhou, China.
5. Synergetic Innovation Center of Chemical Science and Engineering, Tianjin 300071, China.