1. Structural Biology Laboratory; Nara Institute of Science and Technology; 8916-5 Takayama; Ikoma; Nara; 630-0192; Japan
2. Graduate School of Agricultural and Life Sciences; University of Tokyo; Yayoi; Bunkyo; Tokyo; 113-8657; Japan
3. Laboratory of Bioactive Molecules; Graduate School of Life Sciences; Tohoku University; 2-1-1 Katahira; Aoba-ku; Sendai ; 980-8577; Japan