1. MD Bioalpha Inc., Suwon 443-813, Korea.
2. Department of Food and Nutrition Yuhan College, Bucheon 442-749, Korea.
3. School of Life Science and Biotechnology, Korea University, Seoul 136-701 Korea.
4. Department of Bioscience and Biotechnology, Institute of Bioscience, Sejong University, Seoul 143-747, Korea.
5. Department of Physiology, Faculty of Life Science, College of Natural Science, Konkuk University, Chungju 380-701, Korea.
6. Bio-Food and Drug Research Center, Department of Biotechnology, Faculty of Life Science, College of Natural Science, Konkuk University, Chungju 380-701, Korea.