1. State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University , Beijing 100871 , China
2. Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871 , China
3. Peking-Tsinghua Center for Life Sciences, Peking University , Beijing 100871 , China
4. Department of Chemical Biology and Synthetic and Functional Biomolecules Center, College of Chemistry and Molecular Engineering, Peking University , Beijing 100871 , China