1. Laboratory of Stem Cell and Generative Biology, College of Life Sciences, Peking University, Beijing, China
2. Laboratory of Chemical Genomics, School of Chemical Biology and Biothechnology, Shenzhen Graduate School of Peking University, Shenzhen, China
3. Reproductive Medical Center, Peking University People's Hospital, Peking University, Beijing, China
4. Beijing Vital River Laboratory Animal, Inc., Beijing, China
5. Department of Chemistry and the Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California, USA