1. Zhejiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, China
2. College of Biology and Chemical Engineering, Jiaxing University, Jiaxing 314001, China
3. Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience & Biotechnology (KRIBB), Daejeon 305-806, Republic of Korea
4. Department of Bioinformatics, University of Sciences & Technology, Daejeon 205-305, Republic of Korea