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- W2515671603 endingPage "3665" @default.
- W2515671603 startingPage "3649" @default.
- W2515671603 abstract "Visual perception by photoreceptors relies on the interaction of incident photons from light with a derivative of vitamin A that is covalently linked to an opsin molecule located in a special subcellular structure, the photoreceptor outer segment. The photochemical reaction produced by the photon is optimal when the opsin molecule, a seven-transmembrane protein, is embedded in a lipid bilayer of optimal fluidity. This is achieved in vertebrate photoreceptors by a high proportion of lipids made with polyunsaturated fatty acids, which have the detrimental property of being oxidized and damaged by light. Photoreceptors cannot divide, but regenerate their outer segments. This is an enormous energetic challenge that explains why photoreceptors metabolize glucose through aerobic glycolysis, as cancer cells do. Uptaken glucose produces metabolites to renew that outer segment as well as reducing power through the pentose phosphate pathway to protect photoreceptors against oxidative damage." @default.
- W2515671603 created "2016-09-16" @default.
- W2515671603 creator A5030345626 @default.
- W2515671603 creator A5057620589 @default.
- W2515671603 date "2016-08-20" @default.
- W2515671603 modified "2023-10-16" @default.
- W2515671603 title "Metabolic and redox signaling in the retina" @default.
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