1. Department of Life Science, Pohang University of Science and Technology, Pohang 790-784
2. Division of Marine Life Sciences, Kangnung National University, Kangnung 210-702
3. Hormone Research Center, Chonnam National University, Kwangju 500-757
4. Molecular Genetics Program, The Wistar Institute, Philadelphia, Pennsylvania 19104
5. Department of Microbiology, Faculty of Medicine, National University of Singapore, Singapore 117597, Republic of Singapore
6. Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, New York, New York 10021
7. Cancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland 20892-4470
8. Center for Cell Signaling Research, Division of Molecular Life Sciences and College of Pharmacy, Ewha Womans University, Seoul 120-750, Korea