1. College
of Pharmacy, Chung-Ang University, Seoul 156-756, Republic of Korea
2. Institute
of Industrial Biotechnology, Department of Biological Engineering, Inha University, Incheon 402-751, Republic of Korea
3. Department
of Biological Sciences, KAIST, Daejeon 305-701, Republic of Korea
4. College
of Pharmacy, Gachon University, Incheon 406-840, Republic of Korea