1. School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Room 311, Beijing 100084, China
2. School of Medicine, Comprehensive AIDS Research Center, and Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University,Medical Sciences Building, Suite A209, Beijing 100084, China
3. Beijing Advanced Innovation Center for Structural Biology, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Center for Global Health and Infectious Diseases, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Medical Sciences Building, Suite A207, Beijing 100084, China