1. Institute of Biotechnology, Key Laboratory of Chemical Biology and Molecular Engineering of National Ministry of Education, Shanxi University, Taiyuan 030006, China
2. Institute of Biomedical Sciences, Shanxi University, Taiyuan 030006, China
3. School of Life Science, Shanxi University, Taiyuan 030006, China
4. Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA 94143, USA