Magnetic nanoparticles-cooperated fluorescence sensor for sensitive and accurate detection of DNA methyltransferase activity coupled with exonuclease III-assisted target recycling.

本文基于磁性纳米颗粒协同核酸外切酶III（Exo III）辅助循环指数放大与ZnPPIX/G-四链体超分子结构，建立了一种用于DNA甲基转移酶活性的荧光磁性生物传感器。首先，将四链体形成寡核苷酸与分子信标杂交形成的双链DNA探针通过生物素-链霉亲和素作用组装在磁性纳米颗粒（MNPs）表面作为报告探针。含GATC序列的发夹探针（HP）...