| Literature DB >> 6474835 |
T Suzuki, M Makino-Tasaka, E Eguchi.
Abstract
11-Cis-3-dehydroretinal was found in the eye of crayfish, Procambarus clarkii. The 11-cis-3-dehydroretinal was isomerized to all-trans isomer by light-illumination, as was also 11-cis-retinal. Irradiation with deep-red light (lambda greater than 680 nm) selectively isomerized the 11-cis-3-dehydroretinal. The 3-dehydroretinal was not extracted with petroleum ether from the tissue after freeze-drying. These facts suggest that the 11-cis-3-dehydroretinal is the chromophore of crayfish visual pigment. The 3-dehydroretinal content varied with season, high level in winter and low in summer. The crayfish may have a vitamin A1-A2 visual pigment system similar to those of freshwater fishes and amphibians.Entities:
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Year: 1984 PMID: 6474835 DOI: 10.1016/0042-6989(84)90149-4
Source DB: PubMed Journal: Vision Res ISSN: 0042-6989 Impact factor: 1.886