计算溶液所需的质量、体积或浓度。
BioReagent 级 ,适用于对基线干扰要求严格的色谱和分析工作流程。
2-8°C储存。低温运输 。请查阅批次 COA 获取详细规格。
SDS、COA、产品数据表及规格说明书均可下载。可通过批号查询获取批次 COA。
在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
脱氢表雄酮(DHEA)又称雄性激素,是一种内源性类固醇激素前体。它是最丰富的循环类固醇之一。然而,DHEA本身也有多种潜在的生物效应,与一系列核和细胞表面受体结合,并作为神经类固醇和神经营养因子受体的调节剂。它通过硫代转移酶SULT2A1和少量的SULT1E1在C3β位上的硫酸化作用转化为DHEA-S。DHEA-S在循环中的水平约为DHEA的250-300倍。DHEA-S又可在外周组织中通过类固醇硫酸盐酶(STS)转化回DHEA。它的终末半衰期很短,只有15到30分钟。相反,DHEA-S的终末半衰期要长得多,为7到10小时。由于DHEA-S可以转化回DHEA,它可以作为DHEA的循环库,从而延长DHEA的持续时间。 本试剂盒采用竞争法酶联免疫吸附试验(ELISA)。往预先包被有人脱氢表雄酮(DHEA)抗原的微孔中,依次加入样本、标准品、Biotin标记的抗体,HRP酶结合物,中间经过温育和洗涤,用底物TMB显色,TMB在过氧化物酶(HRP)的催化下转化成蓝色,并在酸的作用下转化成最终的黄色。颜色的深浅和样本中的人脱氢表雄酮(DHEA)呈负相关。用酶标仪在450nm波长下测定吸光度(OD值),计算样本浓度。
This kit employs the competitive enzyme-linked immunosorbent assay (ELISA) principle. Microplate wells are pre-coated with Human DHEA antigen. The sample, standards, a biotin-labeled antibody, and an HRP enzyme conjugate are then added sequentially to the wells. The procedure includes incubation and wash steps between each addition. TMB substrate is used for color development. In the presence of the peroxidase (HRP) enzyme, TMB is catalyzed to produce a blue color, which is then converted into a final stable yellow color upon the addition of an acid stop solution. The intensity of the resulting yellow color is inversely proportional to the concentration of Human DHEA in the sample. The optical density (OD) is measured at a wavelength of 450 nm using a microplate reader, and the concentration of the target analyte in the sample is calculated based on the standard curve.