Institution: | a Department of Biophysics and Chemical Biology and Institute of Microbiology, Seoul National University, Seoul 151-742, Republic of Korea b Department of Environmental Medical Biology and Institute of Tropical Medicine, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul 120-752, Republic of Korea c Department of Environmental Science, Hankuk University of Foreign Studies, Yongin, Kyunggi-Do 449-791, Republic of Korea |