... Arikawa1and Koichi Ozaki21Graduate School of Integrated Science, Yokohama City University, Yokohama, Kanagawa;2Graduate School of Frontier Biosciences,Osaka University, Toyonaka, Osaka, JapanRetinoid-binding ... subsequently causes a conformational change of the opsin into an active form. The activated rhodopsin, usually called metarhodopsin, triggers the phototransduction cascade, that eventually controls the flow ... amount of 3-hydroxyretinol was increased in the distal portion, and decreased in the proximal portion, by light adaptation of the eye. Light adaptation alsoinduced the decrease of all-trans isomer...