1. Department of Chemistry, Pukyong National University, Busan 608-737, Republic of Korea
2. Key Laboratory of Molecular Enzymology and Enzyme Engineering of Ministry Education, College of Life Science, Jilin University, Changchun 130021, China
3. Marine Bioprocess Research Center, Pukyong National University, Busan 608-737, Republic of Korea
4. School of Pharmaceutical Sciences, Changchun University of Chinese Medicine, Changchun 130117, China