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BioReagent 级 ,适用于对基线干扰要求严格的色谱和分析工作流程。
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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。
分泌型免疫球蛋白A(secretory immunoglobulin A,SIgA)是20世纪60年代初在外分泌液中发现的一种IgA抗体,主要存在于乳汁、胃肠液、呼吸道分泌液等外分泌液中。SIgA分子是由2个IgA单体(每个单体含2条轻链和2条重链)、1条J链和1条分泌片(secretory component,SC,为多聚免疫球蛋白受体的胞外裂解片段)构成的异源十聚体,为了与血清IgA单体相区别而被命名为SIgA。SIgA是外分泌液中存在的一种主要抗体,是呼吸道、消化道、泌尿生殖道等抵御病原体及有害物质的第一道免疫防线,是机体黏膜免疫最重要的抗体。 本试剂盒采用竞争法酶联免疫吸附试验(ELISA)。往预先包被有小鼠分泌型免疫球蛋白A(sIgA)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小鼠分泌型免疫球蛋白A(sIgA)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 Mouse sIgA 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 Mouse sIgA 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.