Scotopsin
Scotopsin is a component of the visual pigments. These dyes enable vision by converting light stimuli into electrical excitations .
Scotopsin refers to the opsin of the rods . Rods are receptors , i.e. sensory cells, in the retina of animals. A common synonymous term for scotopsin is rod opsin .
Scotopsin is a necessary but not the only component of those visual pigments that enable scotopic vision in poor light conditions . The two very intensively researched visual pigments that are formed by scotopsin are called rhodopsin if they contain retinal 1 as chromophore and porphyropsin if their chromophore is retinal 2. Animals living on land and marine fish form their visual pigments exclusively with retinal 1. Freshwater fish and many amphibians can also form visual pigments with retinal 2. In contrast to most terms that end in the word -opsin , scotopsin clearly and exclusively means the protein content of a visual pigment and not all of the pigment, including retinal.
(See also the main article Opsin - it contains a rough overview of other terms that end in the word -opsin .)
credentials
- ^ Roche: Medical Lexicon
- ↑ Prakash M., ea: Encyclopaedia Of Animal Physiology (Set Of 13 Vols) , Anmol Publications PVT. LTD., 1998, p. 124, ISBN 8174886761 , here online