Cis-Trans Isomerization of Retinal

11-cis-Retinal → all-trans-Retinal

概要

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.

日常の例

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

産業上の重要性

レチナール光化学の理解は、人工網膜、オプトジェネティクスツール、そして光感受性バイオマテリアルの開発を導いています。

特性

タイプ
Photochemical
可逆的
いいえ
エネルギー
吸熱性
触媒
Rhodopsin protein

関連する反応

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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).