
Abstract Opsins, the protein moieties of animal visual photo-pigments, have emerged as moonlighting proteins with diverse, light-dependent and -independent physiological functions. This raises the need to revise some basic assumptions concerning opsin expression, structure, classification, and evolution.
Evolution, Molecular, Opsins, Perspective, Rod Opsins, Animals, Retinal Pigments, G protein-coupled receptors; Moonlighting proteins; Photosensitivity; Sensory cell evolution; Sensory transduction; Vision, Phylogeny
Evolution, Molecular, Opsins, Perspective, Rod Opsins, Animals, Retinal Pigments, G protein-coupled receptors; Moonlighting proteins; Photosensitivity; Sensory cell evolution; Sensory transduction; Vision, Phylogeny
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