Isomerización cis-trans de 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.

Preguntas frecuentes

What is the equation for Isomerización cis-trans de retinal?
The balanced equation is: 11-cis-Retinal → all-trans-Retinal.
What type of reaction is Isomerización cis-trans de retinal?
Isomerización cis-trans de retinal is a fotoquímica reaction.
Is Isomerización cis-trans de retinal exothermic or endothermic?
Isomerización cis-trans de retinal is endothermic (absorbs energy).
What conditions are needed for Isomerización cis-trans de retinal?
This reaction requires a catalyst (Rhodopsin protein).