retinal

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retinal

 [ret´ĭ-nal]
1. pertaining to the retina.
2. the aldehyde of retinol, having vitamin A activity. One isomer (11-cis-retinal) combines with opsin in the retinal rods (scotopsin) to form rhodopsin (visual purple); another, all-trans-retinal, or visual yellow, results from the bleaching of rhodopsin by light, in which the 11-cis form is converted to the all-trans form. Retinal also combines with opsins in the retinal cones to form the three pigments responsible for color vision.

ret·i·nal

(ret'i-năl),
1. Relating to the retina.
2. Retinaldehyde, most commonly referring to the all-trans form; participates in the visual process; 11-cis-retinal binds with an opsin to form iodopsin or rhodopsin; light causes the formation of all-trans-retinal, which dissociates from the protein.

retinal 1

(rĕt′n-ăl′)
adj.
Of or relating to the retina of the eye.

retinal 2

(rĕt′n-ăl′, -ôl′)
n.
Either of two chromophores that are aldehydes of vitamin A1 and vitamin A2 and that bind covalently with an opsin protein to form rhodopsin or porphyropsin. Also called retinene.

retinal

adjective Referring to the retina noun 11-cis-retinal, vitamin A aldehyde A retinal pigment that absorbs visible light at 400-600 nm, resulting in an isomeric transition of the 11-cis-retinal moiety to a trans-retinal conformation causing a G protein-mediated depolarization event

ret·i·nal

(ret'i-năl)
1. Relating to the retina.
2. Retinaldehyde; most commonly referring to the all-trans form.

retinal

The aldehyde found in visual pigments, such as visual purple. Also known as retinaldehyde.

retinal 

1. Pertaining to the retina.
2. See rhodopsin.
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