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Reactions that constitute the retinoid cycle. The asterisk denotes the active signaling state of rhodopsin (meta-II rhodopsin). Abbreviations: LRAT, lecithin:retinol acyltransferase; NAD, nicotinamide adenine dinucleotide; PC, phosphatidylcholine; RDH, retinol dehydrogenase; Rho, rhodopsin; RPE, retinal pigment epithelium.
