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Answer for the clue "Either of two yellow to red retinal pigments formed from Rhodopsin by the action of light ", 8 letters:
retinene

Word definitions for retinene in dictionaries

Wiktionary Word definitions in Wiktionary
n. 1 (context biochemistry English) Either of two carotenoid pigments found in the retina and produced from vitamin A; retinal 2 # retinaldehyde 3 # dehydroretinaldehyde

WordNet Word definitions in WordNet
n. either of two yellow to red retinal pigments formed from Rhodopsin by the action of light [syn: retinal ]

Wikipedia Word definitions in Wikipedia
The Retinenes (Retinene and Retinene) are chemical derivatives of the dietary supplement vitamin A (see retinol ) formed through oxidation reactions. Retinene is better known as retinaldehyde or simply retinal and is fundamental in the transduction of light ...

Usage examples of retinene.

The molecule of rhodopsin is made up of two parts: a protein, opsin, and a nonprotein portion, very similar in structure to vitamin A, which is retinene.