1. Department of Chemistry, University of California, Davis, California 95616,
United States
2. Graduate
School of Analytical
Science and Technologies, Chungnam National University, Daejeon 305-764, South Korea
3. Agilent Technologies, Inc., Santa Clara, California 95051, United States
4. Department of Biochemistry and
Molecular Medicine, University of California, Davis, California 95616, United States