i.e., diaminopyrimidine, was intentionally and maximally exposed to the immune system in animals in order to induce antibodies with broad specificity against ASGs. Five monoclonal antibodies (mAbs) were finally obtained, and 5C4 from the hapten with a short spacer arm, named Hapten A, showed not only uniform broad specificity but also high affinity to all five ASGs. We further determined the possible
具有广泛特异性并且主要取决于半抗原结构和大小的
抗体是用于开发类选择性免疫测定法的关键试剂。在本研究中,使用
甲氧苄啶为起始分子,提出了三种新的抗菌增效剂(ASG)通用半抗原。这些半抗原在间位上含有羧基在三
甲氧基苯的位置结合蛋白质,而有意地和最大程度地将ASG的共同部分,即二
氨基嘧啶暴露于动物的免疫系统中,以诱导具有针对ASG的广泛特异性的
抗体。最终获得了五种单克隆
抗体(mAb),带有短间隔臂的半抗原5C4命名为Hapten A,不仅显示出均一的广泛特异性,而且对所有五个ASG均显示出高亲和力。我们从构象和电子方面进一步确定了单克隆
抗体的可能识别机制。建立了基于间接竞争ELI
SA(icELI
SA)的5C4,其IC 50值为0.067–0.139μgL –1在最佳条件下,缓冲液中的五个ASG的交叉反应率为48.2%–418.7%。鸡肉和牛奶的icELI
SA检测极限分别为0.06–0.8μgkg –1和0