1. Korea Institute of Bioscience and Biotechnology, KIST, Yusong, Taejon, 305-333, Korea
2. Departments of Nutrition and Food Science, Kyungpook National University, Taegu, 702-701
3. Departments of Genetic Engineering, Kyungpook National University, Taegu, 702-701
4. Chungnam National University School of Pharmacy, Taejon, 305-764, Korea