1. CAS Key Laboratory of Microbial Physiological and Metabolic EngineeringState Key Laboratory of Microbial ResourcesInstitute of MicrobiologyChinese Academy of SciencesBeijing 100101 P. R. China
2. Tianjin Institute of Industrial BiotechnologyChinese Academy of SciencesTianjin 300308 China
3. University of Chinese Academy of SciencesBeijing 100190 China