1. Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
2. Department of Neurophysiology, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.
3. Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Kawaguchi, Saitama, Japan.
4. The HAKUBI Center, Kyoto University, Sakyo-ku, Kyoto, Japan.
5. Department of Cell Biology, The Scripps Research Institute, La Jolla, CA, USA.