A survey of 3-dehydroretinal as a visual pigment chromophore in various species of crayfish and other freshwater crustaceans |
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Authors: | T. Suzuki E. Eguchi |
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Affiliation: | (1) Department of Pharmacology, Hyogo College of Medicine, 663 Nishinomiya, Hyogo, (Japan);(2) Department of Biology, Yokohama City University, Kanazawa-ku, 236 Yokohama, (Japan) |
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Abstract: | Summary 3-Dehydroretinal (vitamin A2 aldehyde) was found in the eyes of three species among 10 species of freshwater crayfish examined. Since dark-adapted eyes contained the 11-cis form of 3-dehydroretinal, this compound must be the chromophore of the visual pigment. 3-Dehydroretinal always coexisted with retinal (vitamin A1 aldehyde), indicating the presence of a rhodopsin-porphyropsin visual pigment system. |
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Keywords: | 3-dehydroretinal retinal visual pigment crayfish |
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