visual pigment - ορισμός. Τι είναι το visual pigment
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Τι (ποιος) είναι visual pigment - ορισμός

INTERPRO FAMILY
Visual pigment; Opsins; Pinopsin; Cilopsin; Ciliary opsin
  • The retinal molecule inside an opsin protein absorbs a photon of light.  Absorption of the photon causes retinal to change from its 11-cis-retinal isomer into its all-trans-retinal isomer.  This change in shape of retinal pushes against the outer opsin protein to begin a signal cascade, which may eventually result in chemical signaling being sent to the brain as visual perception. The retinal is re-loaded by the body so that signaling can happen again.
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  • Consensus sequences of the different chromopsins: The first column contains a number for each chromopsin group for easy reference. The second column shows the names for each group. The third contains the number of sequences in each group. And the fourth column contains the [[sequence logo]], the height of the letters indicates the percentage of that [[amino acid]] given at that position. The x-axis gives the position of the amino acid corresponding to cattle rhodopsin. Positions 292<sup>7.39</sup> and 314<sup>7.64</sup> are highlighted in gray. [[Lysine]] (K) 296<sup>7.43</sup> is highlighted with a gray background, which is replaced in the nemopsins by [[arginine]] (R) and in the gluopsins by [[glutamic acid]] (E). The NPxxY<sup>7.53</sup> motif is highlighted with a gray background. It is conserved in most opsins and G-protein-coupled receptors, however it is derived in the retinochromes, RGR-opsins, and Gluopsins.<ref name=Guehmann2022 />

Ommochrome         
SEVERAL BIOLOGICAL PIGMENTS THAT OCCUR IN THE EYES OF CRUSTACEANS AND INSECTS. THE EYE COLOR IS DETERMINED BY THE OMMOCHROMES.
Visual Pigment
Ommochrome (or visual pigment) refers to several biological pigments that occur in the eyes of crustaceans and insects. The eye color is determined by the ommochromes.
Photosynthetic pigment         
  • [[Electromagnetic spectrum]] – wavelengths in metres}}
PIGMENT THAT IS PRESENT IN CHLOROPLASTS OR PHOTOSYNTHETIC BACTERIA AND CAPTURES THE LIGHT ENERGY NECESSARY FOR PHOTOSYNTHESIS
Photosynthetic Pigments; Antenna pigment; Antenna pigments; Light harvesting pigment; Photosynthetic pigments; Photosynthetic antenna molecule; Light-harvesting pigment; Pigments in Chloroplast; Draft:Pigments in Leaves; Draft:Pigments in Chloroplast; Draft:List of pigments in chloroplast
A photosynthetic pigment (accessory pigment; chloroplast pigment; antenna pigment) is a pigment that is present in chloroplasts or photosynthetic bacteria and captures the light energy necessary for photosynthesis.
Earth pigment         
  • A range of pigments were mined by [[Indigenous Australians]] at this Ochre Pit in central [[Australia]].
NATURALLY OCCURRING MINERALS USED AS PIGMENTS
Clay earth pigment
Earth pigments are naturally occurring minerals containing metal oxides, principally iron oxides and manganese oxides, that have been used since prehistoric times as pigments. The primary types are ochre, sienna and umber.

Βικιπαίδεια

Opsin

Animal opsins are G-protein-coupled receptors and a group of proteins made light-sensitive via a chromophore, typically retinal. When bound to retinal, opsins become Retinylidene proteins, but are usually still called opsins regardless. Most prominently, they are found in photoreceptor cells of the retina. Five classical groups of opsins are involved in vision, mediating the conversion of a photon of light into an electrochemical signal, the first step in the visual transduction cascade. Another opsin found in the mammalian retina, melanopsin, is involved in circadian rhythms and pupillary reflex but not in vision. Humans have in total nine opsins. Beside vision and light perception, opsins may also sense temperature, sound, or chemicals.