rhodopsin

English - Turkish

Definition of rhodopsin in English Turkish dictionary

rodopsin

Rodopsin'de

(Tıp) Retina çomaklarında meydana gelen kırmızı pigment

English - English

Definition of rhodopsin in English English dictionary

A light-sensitive pigment in the rod cells of the retina; it consists of an opsin protein bound to the carotenoid retinal

{i} (Biochemistry) visual purple, photosensitive pigment found in the retina of many vertebrates (breaks down into retinal and opsin upon contact which light)

The visual purple

or visual purple Light-sensitive, purple-red organic pigment contained in the rod cells of the retina that allows the eye to see in black and white in dim light. It is composed of opsin, a protein, linked to retinal, a conjugated molecule (see conjugation) formed from vitamin A. Photons of light that enter the eye are absorbed by retinal and cause it to change its configuration, starting a biochemical chain of events that ends with impulses being sent along the optic nerve to the brain. In bright light, to protect rod cells from overstimulation, rhodopsin breaks down into retinal and opsin, both of which are colourless. In dim light or darkness the process is reversed (dark adaptation), and purple-red rhodopsin is reformed. Similar light-sensitive compounds made of retinal and other opsin proteins are the pigments in the retina's cone cells responsible for colour vision in bright light

See under Visual

Hyphenation

rho·dop·sin

Turkish pronunciation

rōdäpsın

Synonyms

visual purple

Pronunciation

/rōˈdäpsən/ /roʊˈdɑːpsən/

Etymology

() From Ancient Greek ῥόδον (rhodon, “rose”), due to its pinkish color, and ὄψις (opsis, “sight”).