ESLighting, DAB Substrates(辣根过氧化物酶显色底物)

ESLighting, DAB Substrates(3,3′-Diaminobenzidine)是一种经典免疫组化(IHC)显色底物,专用于辣根过氧化物酶(HRP)标记系统。在HRP的催化作用下,DAB与过氧化氢(H₂O₂)反应生成不溶性深棕色沉淀,显色清晰且定位精确,适用于靶标蛋白的直观可视化。其沉淀物具有高度化学稳定性,耐受乙醇、二甲苯等有机溶剂处理,可通过合成树脂(如中性树胶、DPX等)进行永久封片,长期保持染色强度及显微形态完整。

ESLighting, DAB Substrates的高电子密度特性可兼容明场显微镜及电镜观察,尤其在福尔马林固定石蜡包埋(FFPE)组织或冷冻切片中表现出优异的对比度与低背景干扰,支持单染或双染显色。需注意,DAB为HRP特异性底物,与碱性磷酸酶(AP)系统无交叉反应;实验设计需严格匹配标记抗体酶系,避免假阴性。因其潜在致癌性,操作时应遵循生物安全规范,并妥善处理废液。

ESLighting, DAB Substrate

 

ESLighting, DAB substrate, is a well-established chromogen used in IHC staining protocols that in the presence of a Horseradish Peroxidase (HRP) enzyme, produces a dark brown precipitate. The precipitate is insoluble in organic solvents and can be coverslipped with a permanently mounted in synthetic resin. Coverslip in aqueous medium is also possible, but shows more deterioration of color intensity over time.
 
 
 

 

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