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氨基甲酸酯类农药适体筛选技术的建立

DOI: 10.7685/j.issn.1000-2030.2011.03.024, PP. 131-134

Keywords: 适体,指数富集的配基系统进化技术(SELEX),荧光,氨基甲酸酯类农药

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Abstract:

体外构建1个长度为91个核苷酸、内含30个随机序列的单链DNA(ssDNA)文库,运用指数富集的配基系统进化技术(SELEX),以氨基甲酸酯类农药的混合药剂作为靶分子,基于核酸分子与靶分子结合时构象会发生改变的原理,分离与靶分子结合的适体,并利用碱裂解法制备ssDNA次级文库。此方法优点在于不需要对农药小分子进行改造。经过9轮循环筛选,对氨基甲酸酯类混合农药的筛选效率从0.70上升到13.32,获得了有特异性的适体。本研究建立了一种非改造型农药小分子适体筛选的新方法,为农药残留快速检测提供条件。

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