1. BNLMS, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering; Peking University; Beijing 100871 China
2. Center for Quantitative Biology, Peking University; Beijing 100871 China
3. National Laboratory of Biomacromolecules; Institute of Biophysics, Chinese Academy of Sciences; Beijing 100101 China
4. Peking-Tsinghua Center for Life Sciences, Peking University; Beijing 100871 China