著者

吉澤 透

出版者

一般社団法人 日本生物物理学会

雑誌

生物物理 (ISSN:05824052)

巻号頁・発行日

vol.36, no.6, pp.260-269, 1996-11-25 (Released:2009-07-09)

参考文献数

41

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A phylogenetic tree of visual pigments we have constructed, revealed that cone pigments evolved earlier than rhodopsins, so that color vision as well as photopic vision appeared earlier than scotopic vision. Conversions of cone pigments to rhodopsins in the process of evolution took place by replacing basic amino acid residues with neutral and/or acidic ones. A noteworthy difference between rhodopsins and cone pigments is that the rhodopsins are longer in lifetime of meta II-intermediate than cone pigments, which would be favorable for conducting the high photosensitivity of rods comparing cones. Chicken tetrachromatic vision was discussed using color diagrams.