1. College of Chemistry and Pharmacy, Qingdao Agricultural University, Changcheng Road, Chengyang, Qingdao City, Shandong Province 266-109, China
2. Department of Molecular Biotechnology, College of Life and Environmental Sciences, Konkuk University, 1 Hwayang-dong, Gwangjin-gu, Seoul, Republic of Korea
3. Department of Agricultural Biotechnology, Seoul National University, 599 Gwanak-ro, Silim-dong, Gwanak-Gu, Seoul 151-742, Republic of Korea