The visual pigment rhodopsin consists of the apoprotein opsin and the retinoid chromophore 11-cis-retinal. Visual signaling is triggered upon photoisomerization of 11-cis-retinal into all-trans-retinal. A new study shows that visual signaling by opsin in the absence of chromophore is a pathogenetic mechanism of visual cell loss.
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Remé, C., Wenzel, A. The dangers of seeing light in the dark. Nat Genet 35, 115–116 (2003). https://doi.org/10.1038/ng1003-115
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DOI: https://doi.org/10.1038/ng1003-115