视黄醛

本條目仍然有文字尚未被翻譯成中文，條目是根據en:Retinene進行翻譯。 歡迎您積極參與翻譯與修訂，目前翻譯的進度為10%。

视黄醛，分子式：C₂₀H₂₈O，是視黃醇氧化後的衍生物。

Retinene1 is better known as retinaldehyde or simply retinal and is fundamental in the transduction of light into visual signals in the photoreceptor level of the retina (known as the visual cycle). Retinene2 is more formally known as dehydroretinaldehyde.

The energy of impinging photons will convert retinaldehyde from an 11-cis isomer into an all-trans form. In the retina, this conversion induces a conformational change in the surrounding photopsin protein pigment, leading to signaling through the G protein transducin. Retinaldehyde also forms a part of bacteriorhodopsin, a light-induced proton pump found in some archaea.

Experimentally, it is possible to replace 11-cis retinaldehyde by perfusing retinal tissue preparations with retinaldehyde derivatives. Selective modification of the retinaldehyde structure, particularly the density of electrons in the π-orbitals, can lead to insights into the interaction between the retinaldehyde moiety and the surrounding pigment protein.

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• 视黄醇

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