1. University of Chinese Academy of Sciences, 19(A) Yuquan Road, Shijingshan District Beijing 100049 People's Republic of China
2. National Engineering Laboratory for Industrial Enzymes and Tianjin Engineering Research Center of Biocatalytic Technology, Tianjin Institute of Industrial BiotechnologyChinese Academy of Sciences, 32 Xi Qi Dao, Tianjin Airport Economic Area Tianjin 300308 People's Republic of China Fax: (+86) 22-24828703