作者单位:Division of Bioscience and Bioinformatics, Myongji University San 38-2 Namdong, Yongin Gyeonggido 449-728, South Korea[1]Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701, South Korea[2]