1. Molecular Glycobiology Research Unit, Korea Research Institute of Bioscience and Biotechnology, Korea Institute of Science and Technology, Yusung, Taejon 305-600, South Korea
2. Department of Biochemistry and Molecular Biology, College of Oriental Medicine, Dong-Guk University, Sukjang-Dong #707, Kyung-Ju City, Kyung-Pook 780-714, South Korea
3. Department of Biochemistry, Yonsei University, Shinchon-Dong #134, Sodamun-Ku, Seoul 120-749, South Korea