1. Department of Biological Science, Silla University, Busan 617-736, Korea
2. South Sea Environment Research Department, Korea Ocean Research and Development Institute, Geoje 656-830, Korea
3. Department of Life Science and Biotechnology, Shin Gyeong University, Hwaseong 445-741, Korea
4. Department of Genetic Engineering, Sungkyunkwan University, Suwon 440-746, Korea