| 释义 |
retinene Biochem.|ˈrɛtɪniːn|
[f. retina + -ene.]
Either of two closely related yellow carotenoids, the aldehydes of vitamins A1 and A2 respectively (spec. that of the former), which occur esp. in the retina combined with opsin as rhodopsin; (sometimes followed by distinguishing numeral). Now more usu. known as retinal.
1934G. Wald in Nature 14 July 65/1 In the retinas of dark adapted animals, no xanthophyll and only a trace of vitamin A occurs. Instead their chloroform extracts contain a third carotenoid with novel properties. I have named this substance retinene. 1950Sci. News XV. 17 Kühne found, when visual purple is acted on by light, that a new substance is formed which he called visual yellow. The latter has now been shown to be closely related to, if not identical with, the aldehyde of vitamin A1, called retinene-1. 1956Nature 28 Jan. 176/1 In the retina, the retinene formed by bleaching rhodopsin ordinarily is reduced to vitamin A. 1970Ibid. 22 Aug. 778/1 Vision..is triggered by isomerization of the carotenoid, retinene. |