chromophore

Cysteine thiol probe (Methyl (4-bromobenzoyl)-L-cysteinate) 是基于硫醇的探针，旨在标记亲电子的天然产物。它能够结合基于烯酮，β-内酰胺和 β-内酯的亲电子代谢物。它具有理想药效团探针的每个特征，并具有发色团。

Coenzyme FO 是辅酶 F420 的合成前体，是 DNA 光解酶的光捕获发色团。

All-trans-retinal (Vitamin A aldehyde) 是视网膜中维生素A 代谢物之一。 生理条件下，它再生为视觉发色团，11-顺式-视黄醛。

Pyridinium bisretinoid A2E (A2E) 是一种能够从视网膜色素上皮的脂褐素中分离到的荧光团，是一种亲脂性阳离子，也是弱光敏剂，具有细胞毒性。Pyridinium bisretinoid A2E 在蓝光诱导条件下促进细胞凋亡，在光活化介导下诱导自噬。当以高浓度呈递给膜时，Pyridinium bisretinoid A2E 诱导膜完整性的浓度依赖性丧失，破坏膜稳定性的趋势。

11-cis Retinal is a chromophore that binds to opsin in the mammalian visual system as an inverse agonist forming the inactive conformation of rhodopsin. When 11-cis retinal absorbs a photon of light, it isomerizes to form all-trans retinal beginning the phototransduction cycle, which is the basis for mammalian vision. A G121L mutation in opsin allows 11-cis retinal to bind as a partial agonist and activate rhodopsin in the absence of light. In a moth model of carotenoid deficiency-induced low visual sensitivity, 11-cis retinal application to compound eyes restored visual sensitivity almost completely.

Complestatin is a compound extracted from Streptomyces lavendulae mycelia; on acid hydrolysis yields D-4-hydroxyphenylglycine & D-3,5-dichloro-4-hydroxyphenylglycine & acidic chromophore; inhibits gp120-CD4 binding. It is isolated from the culture broth of Streptomyces and has anti-HIV-1 activity. It has a role as a metabolite, an antimicrobial agent and an anti-HIV-1 agent.

Phycocyanobilin （PCB） 是一种线性开链四吡咯发色团，是一种胆红素类似物，具有抗炎抗氧化活性，可用于研究阿尔茨海默病等神经系统疾病。