1. Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong SAR, China
2. Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical Sciences, Wuhan University, Wuhan 430071, China
3. Center for Biological Imaging, Core Facilities for Protein Science, Institute of Biophysics, CAS, Beijing, China; University of Chinese Academy of Sciences, Beijing, China;National Key Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China