1. 1Department of Biotechnology and Bioinformatics, Korea University, Sejong 339-700, Republic of Korea
2. †Present address: Konkuk University, Seoul, Republic of Korea.
3. ‡Present address: Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India.
4. 2Department of Food and Nutrition, Duksung Women’s University, Seoul 132-714, Republic of Korea
5. 3Department of Pathology, The University of Chicago, Chicago, IL 60637, USA