About the Authors

Yingzhong Li

Affiliations National Institute of Biological Sciences, Zhongguancun Life Science Park, Beijing, People's Republic of China, College of Life Sciences, Peking University, Beijing, People's Republic of China

Shuxin Li

Affiliation National Institute of Biological Sciences, Zhongguancun Life Science Park, Beijing, People's Republic of China

Dongling Bi

Affiliation National Institute of Biological Sciences, Zhongguancun Life Science Park, Beijing, People's Republic of China

Yu Ti Cheng

Affiliation Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada

Xin Li

Affiliation Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada

Yuelin Zhang

zhangyuelin@nibs.ac.cn

Affiliation National Institute of Biological Sciences, Zhongguancun Life Science Park, Beijing, People's Republic of China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SL DB XL YZ. Performed the experiments: YL SL DB YTC. Analyzed the data: YL SL DB YTC XL YZ. Wrote the paper: YL XL YZ.