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. 1989 Dec;86(23):9606–9610. doi: 10.1073/pnas.86.23.9606

Retinoid requirements for recovery of sensitivity after visual-pigment bleaching in isolated photoreceptors.

G J Jones 1, R K Crouch 1, B Wiggert 1, M C Cornwall 1, G J Chader 1
PMCID: PMC298547  PMID: 2594788

Abstract

After visual-pigment bleaching, single isolated rod photoreceptors of Ambystoma tigrinum recover their sensitivity to light when supplied with 11-cis-retinal from liposomes or with 11-cis-retinal bound to interphotoreceptor retinoid-binding protein. Bleached rods do not recover sensitivity, or do so only very slowly, after exposure to 11-cis-retinol. The latter retinoid is "toxic" in that rods actually lose sensitivity in its presence. In contrast, bleached isolated cone cells recover sensitivity when either retinoid is supplied. It is suggested that the major pathway for rhodopsin regeneration during dark adaptation in the intact eye is transport of 11-cis-retinal from the pigment epithelium to the retina. The results also suggest that there may be separate pathways for visual-pigment regeneration in rods and cones during dark adaptation.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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