1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P. R. China
2. School of Basic Medical Sciences, North China University of Science and Technology, Tangshan 063210, P. R. China
3. Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300350, P. R. China
4. School of Materials Science and Engineering, East China Jiaotong University, Nanchang 330013, P. R. China