HOW DOES LIGHT DISSOCIATE OPSIN FROM RATINAL - Biology - Neural Control and Coordination

Question

HOW DOES LIGHT DISSOCIATE OPSIN FROM RATINAL

G. Lakshmi · Accepted Answer

Phototransduction is the activation of
opsin

Conversion
causes activation of opsin (transduction from light to chemical
signal) and then dissociation of retinal from opsin Trans-retinal
then recycled to 11 cis-retinal

More to
know:

Opsin is a
protein of the retina, especially the protein constituent of
rhodopsin,that makes up one of the visual pigments A red
photopigment in the retinal rods of vertebrates; dissociates into
retinene by light Vertebrate retinas contain two types of
photoreceptors Rods are for vision in dim light, while cones
provide high-speed color vision in bright light The high
dissociation rate of cone opsins combined with the irreversibility
of rhodopsin formation underscores the tendency of rods to steal
chromophore from cones