1. Department of Biology, Sunchon National University, Suncheon 540-742, Republic of Korea
2. Department of Food Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea
3. Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, 52 Oun-dong, Yuseong, Daejeon 305-333, Republic of Korea