Institution: | aDivision of Life Science, Korea Basic Science Institute, Daejeon 305-333, Republic of Korea;bDepartment of Life Science, Sogang University, Shinsu-Dong 1, Mapo-Gu, Seoul 121-742, Republic of Korea;cGraduate School of Analytical Science and Technology, Chungnam National University, Daejeon 305-764, Republic of Korea;dMass Spectrometry Research Center, Korea Basic Science Institute, 804-1 Yangchung-Ri, Ochang, Chungbuk 363-883, Republic of Korea |