1. Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing 100084, China
2. Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
3. State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
4. X-ray Science Division, Argonne National Laboratory, Lemont Illinois 60439, United States