**Acknowledgements**

We wish to thank our collaborators and coworkers for their contributions to work described in this review. We appreciate Dr. Motoo Shiro (Rigaku Co. Ltd.), Prof. Reiko Kuroda (Chubu University), and Dr. Yasuyuki Yamada (Nagoya University) for their great assistance and helpful discussion. Financial supports from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan, the Uehara Memorial Foundation, the Tokyo Ohka Foundation for the Promotion of Science and Technology, Kanagawa, Japan, the Tokyo Biochemical Research Foundation, Tokyo, Japan, Japan Society for the Promotion of Science (JSPS), and Tokyo University of Science are gratefully acknowledged.
