…It is also called visual purple. It is a purple-red pigment protein contained in the outer segment of the rods of the retina and functions as a light receptor. There are two types of photoreceptor cells in the retina: cones and rods. The former respond to strong light and are responsible for color vision, while the latter distinguish light and dark in weak light but are not involved in color vision. Rhodopsin is a complex protein formed by the binding of opsin, a component of the intracellular disk membrane with a molecular weight of 38,000, to 11-cis-retinal, a derivative of vitamin A. … *Some of the terminology that mentions "opsin" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…視紅visual purpleともいう。網膜の杆状体(かんじようたい)の外節に含まれる紫紅色の色素タンパク質で,光の受容体として機能する。網膜には2種類の視細胞,錘状体と杆状体がある。前者は強い光に反応して色覚をつかさどり,後者は弱い光のもとで明暗を識別するが,色覚には関係しない。ロドプシンは,細胞内のディスク膜の成分である分子量3万8000のオプシンopsinに,ビタミンAの誘導体11‐シス‐レチナールretinalが結合した複合タンパク質である。… ※「opsin」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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