CAROTENOIDS AND THE VISUAL CYCLE

@article{Wald1935CAROTENOIDSAT,
  title={CAROTENOIDS AND THE VISUAL CYCLE},
  author={George Wald},
  journal={The Journal of General Physiology},
  year={1935},
  volume={19},
  pages={351 - 371}
}
  • G. Wald
  • Published 20 November 1935
  • Biology
  • The Journal of General Physiology
1. Carotenoids have been identified and their quantities measured in the eyes of several frog species. The combined pigment epithelium and choroid layer of an R. pipiens or esculenta eye contain about 1γ of xanthophyll and about 4γ of vitamin A. During light adaptation the xanthophyll content falls 10 to 20 per cent. 2. Light adapted retinas contain about 0.2–0.3 γ of vitamin A alone. 3. Dark adapted retinas contain only a trace of vitamin A. The destruction of their visual purple with… 

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  • Biology
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    The Journal of general physiology
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  • Medicine
    The Journal of general physiology
  • 1935
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