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TMB color reagent A solution (3,3',5,5'-tetramethylbenzidine)

CAS number:unknown    molecular formula:

overview

compound introduction

3,3',5,5'-Tetramethylbenzidine (TMB)是一种过氧化物酶底物,用于ELISA 反应。底物产生一种可溶性淡蓝色的末端产物,可在370 或 655 nm在分光光度计上读取。TMB反应可以用2 M H2SO4 (产生黄色)终止,450 nm读取。 TMB又分可溶型和沉淀型。 可溶型:与HRP反应形成可溶性蓝褐色产物,适用于ELISA及其他通过液体反应检测HRP的应用,与HRP反应形成沉淀性蓝褐色产物,一步即用型溶液,无需混合,方便快捷 。 沉淀型:适用于Western Blot及其免疫沉淀化学等,一步即用型溶液,无需混合,方便快捷 单组分TMB过氧化物酶底物正常情况下淡黄色、淡蓝色或者是淡绿色。底物溶液在650nm时检测OD值小于0.04。 使用方法: 根据需要等量混合,每孔100ul。注意混合马上使用,不要超过1小时,否则,敏感性降低。 温育:上述加液后,根据个人试验需要,可温育15-30分钟。 终止:加等体积的1N的HCl或者2N的H2SO4来终止反应。酶标孔中反应液从蓝色变为黄色。 读数:终止反应后,30分钟内在450nm处读数 注意: 降低底物强度:如果出现高的反应背景和/或沉淀, 表明TMB底物反应过于强烈。为了避免产生沉淀,可以在加入终止液后马上读数;另外,可以进一步稀释一抗和/或HRP结合物。为了降低非特异 在辣根过氧化酶HRP的数种颜色反应底物中,TMB因其灵敏度较高及无致癌性而得到广泛应用。本产品采用稳定敏感的配方,辣根过氧化物酶接物反应时产生一种深蓝色的产物,适用于定量以及定性分析的酶联免疫分析当中,但不适用于膜染色或者是免疫组织化学染色。 TMB is a substrate for horseradish peroxidase. Forms a soluble blue end product that may be read at 370 nm or 655 nm. The TMB reaction may be stopped with 0.5 M H2SO4, resulting in a yellow color, and read at 450 nm. Recommended for ELISA (microwell) procedures, not recommended for membrane applications. 3,3′,5,5′-Tetramethylbenzidine has been used in a study to demonstrate that by measuring substrate absorption values off the absorption maximum, the measuring range of any immunoenzymometric assay can be extended significantly without jeopardizing assay characteristics. 3,3′,5,5′-Tetramethylbenzidine has also been used in a study to understand the formation of CuS concave superstructures with peroxidase-like activity.

Specs

Chinese alias-
English alias3,3′,5,5′-Tetramethylbenzidine Liquid Substrate System TMB
CAS numberunknownmolecular formula
molecular weight-Exact mass过氧化物酶底物
PSA-logp-

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