1. School of Bioresource, College of Natural Science, Andong National University, Andong, Kyungbuk 760-749, Korea.
2. Corresponding author. Phone: 82 54 820 5492. Fax: 82 54 823 1627. E-mail: kmchung@andong.ac.kr.
3. Department of Food Science and Technology, School of Agricultural Biotechnology, and Research Center for New Bio-Materials in Agriculture, Seoul National University, Korea.
4. Research Center for New Bio-Materials in Agriculture, Seoul National University, Korea.
5. Department of Food Science and Technology, School of Agricultural Biotechnology, Seoul National University, Korea.