〇Kojiro Hirokane^1,2, Toru Nakamura¹, Takuma Terashita¹, Yasuo Kubota³, Dan Hu³, Takeshi Yagi¹, Ann M Grayibiel³, Takasi Kitsukawa^1,2 (1.Frontier BioScience Grad School Osaka Univ, Osaka, Japan, 2.Grad School of Life Science, Ritsumeikan Univ, Shiga, Japan, 3.McGovern Institute for Brain Research at the Massachusetts Institute of Technology, Cambridge, USA)