1. National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China; 3. College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; 4. Laboratory of Non-coding RNA, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; 5. College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China; 6. Key Laboratory of Interdisciplinary Research, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China