1. Laboratory of Protein Structure, Function and Design, Graduate School of Pharmaceutical Sciences, Kyushu University; 3-1-1 Maidashi Higashi-Ku Fukuoka 812-8582 Japan
2. Faculty of Pharmaceutical Sciences, Nagasaki International University; 2825-7 Huis Ten Bosch-Cho Sasebo Nagasaki 859-3298 Japan
3. Department of Chemistry and Bioscience; Graduate School of Science and Engineering, Kagoshima University; Korimoto, 1-21-40 Kagoshima 890-0065 Japan
4. Department of Clinical Chemistry and Laboratory Medicine; Graduate School of Medical Sciences, Kyushu University; 3-1-1 Maidashi Higashi-Ku Fukuoka 812-8582 Japan