1. The National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China, Graduate School of Chinese Academy of Sciences, Beijing 100080, China, School of Life Science and Technology, Xi‘an Jiaotong University, Xi‘an 710049, China, and Department of Biochemistry and Molecular Biology, Beijing Normal University, Beijing Keb Laboratory, Beijing 100875, China