Fluorescence biosensing strategy based on mercury ion-mediated DNA conformational switch and nicking enzyme-assisted cycling amplification for highly sensitive detection of carbamate pesticide.

农药残留可能危害环境和人体健康。本文基于乙酰胆碱酯酶（AChE）催化水解产物触发Hg2+释放，并耦合内切酶诱导双链DNA切割的循环放大，开发高灵敏荧光生物传感器检测氨基甲酸酯类农药。体系含未修饰单链辅助探针HP1和淬灭-荧光探针QFP：HP1通过T-Hg2+-T碱基对形成发夹；QFP两端标记FAM和BHQ1，含识别序列和Nb.Bts...