Abstract
All known visual pigments are characterized by a common chromophoric group, 11-cis retinal, which is converted into all-trans retinal by the absorption of a quantum of light. This absorption process is followed by a series of conformation changes in the protein compound. The photochemical cycle in vertebrates is finished by the separation of the visual pigment into free retinal and opsin. In invertebrates the rhodopsins are not split up; the degradation stops at the thermostable metarhodopsin stage. These stable metarhodopsins are reconverted into rhodopsin by light. Recently it has been shown that this process of photoreconversion is important to maintain sensitivity in the photoreceptors of insects (HAMDORF et al., 1973b).
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Täuber, U. (1975). Photokinetics and Dichroism of Visual Pigments in the Photoreceptors of Eledone (Ozoena) moschata . In: Snyder, A.W., Menzel, R. (eds) Photoreceptor Optics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-80934-7_18
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DOI: https://doi.org/10.1007/978-3-642-80934-7_18
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