1. Department of Biotechnology, College of Engineering, Yonsei University, Seoul 120-749, Korea, Department of Pharmacology, School of Medicine, Konkuk University, Chungju 380-701, Korea, Institute of Life Science and Biotechnology, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Korea, Department of Molecular Biophysics and Biochemistry, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, Connecticut 06510, R&D Center, Equispharm Company, Limited, 3F Sung-ok...