Cis-Trans Isomerization of Retinal

11-cis-Retinal → all-trans-Retinal

Descripción general

When a photon strikes rhodopsin in rod cells of the retina, it causes the 11-cis-retinal chromophore to isomerize to the all-trans configuration in about 200 femtoseconds. This is one of the fastest known chemical reactions and the fundamental first step in vision. The conformational change triggers a G-protein signaling cascade.

Ejemplo cotidiano

Every time you see anything, this photochemical reaction is occurring millions of times per second in the rod and cone cells of your eyes.

Importancia industrial

Comprender la fotoquímica del retinal guía el desarrollo de retinas artificiales, herramientas de optogenética y biomateriales fotosensibles.

Propiedades

Tipo: Photochemical
Reversible: No
Energía: Endotérmico
Catalizador: Rhodopsin protein

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Frequently Asked Questions

What is the equation for Cis-Trans Isomerization of Retinal?

The balanced equation is: 11-cis-Retinal → all-trans-Retinal.

What type of reaction is Cis-Trans Isomerization of Retinal?

Cis-Trans Isomerization of Retinal is a photochemical reaction.

Is Cis-Trans Isomerization of Retinal exothermic or endothermic?

Cis-Trans Isomerization of Retinal is endothermic (absorbs energy).

What conditions are needed for Cis-Trans Isomerization of Retinal?

This reaction requires a catalyst (Rhodopsin protein).