1. Biomolecular Chemistry Laboratory; Graduate School of Engineering, Nagasaki University; 852-8521 Japan
2. Division of Biochemistry; Faculty of Fisheries, Nagasaki University; 852-8521 Japan
3. Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology; Tsukuba 305-8568 Japan
4. Center for Technical Support; Faculty of Science and Technology, Tokushima University; 770-8506 Japan
5. Laboratory of Pharmacology; Faculty of Nursing, Shikoku University; Tokushima 771-1192 Japan