1. State Key Laboratory of Microbial Metabolism, School of Life Science and BiotechnologyShanghai Jiao Tong UniversityShanghai 200030 P. R. China
2. Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education and School of Pharmaceutical SciencesWuhan UniversityWuhan 430071 P. R. China
3. Hubei Engineering Laboratory for Synthetic MicrobiologyWuhan Institute of BiotechnologyWuhan 430075 P. R. China