iodopsin


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Related to iodopsin: photopsin

i·o·dop·sin

(ī'ō-dop'sin),
Any of three visual pigments, composed of 11-cis-retinal bound to an opsin, found in the cones of the retina.
Synonym(s): visual violet
[G. ion, violet, + ōps, eye, + -in]

iodopsin

/io·dop·sin/ (i″ah-dop´sin) a photosensitive violet pigment found in the retinal cones of some animals and important for color vision.

iodopsin

(ī′ə-dŏp′sĭn)
n.
Any of a class of light-sensitive pigments found in the retinal cones of the vertebrate eye.

iodopsin

[ī′ōdop′sin]
Etymology: Gk, ioeides + optikos, vision
a photosensitive chemical in the cones of the retina that reacts in association with other chemicals and plays a part in color vision. Iodopsin is more stable when exposed to bright light than rhodopsin, which is found in the rods of the retina. Color vision, a synthesis of red, green, and blue light, is induced by changes within the pigments of different types of cones during a photochemical process in which coded nerve impulses are sent to the brain. Research on the exact role of iodopsin in color vision, which is still unknown, is ongoing.

io·dop·sin

(ī'ō-dop'sin)
A visual pigment, composed of 11-cis-retinal bound to an opsin, found in the cones of the retina.
Synonym(s): visual violet.
[G. ion, violet, + ōps, eye, + -in]

iodopsin

a photochemical pigment contained within CONE CELLS present in the retina of most vertebrate eyes. Iodopsin consists of RETINOL and a protein, which is different for each of the three cone pigments and as a result each of the pigments has a different colour. The three colours are blue, green and red, which correspond to the region of the visible spectrum in which each cone pigment absorbs light maximally. When bleached by absorbed light, iodopsin dissociates into retinaldehyde and the different protein group which ultimately triggers off an action potential and the production of nerve impulses in the ganglion cells leading to the optin nerve.

iodopsin

A photosensitive pigment found in the retinal cones of the chicken. Its maximum absorption is around 562 nm.

iodopsin

a visual pigment.