A label-free fluorescent adenosine triphosphate biosensor via overhanging aptamer-triggered enzyme protection and target recycling amplification.
本文报道了一种基于悬垂适配体的无标记荧光三磷酸腺苷(ATP)适配体传感器。该传感器由富含鸟嘌呤的DNA发夹(GHP)和带5'/3'悬垂序列的ATP适配体组成。无ATP时,适配体5'悬垂序列覆盖GHP的3'凹陷末端,通过空间位阻抑制外切酶III(exo III)对GHP的非特异性切割,从而显著降低背景噪声。存在ATP时,ATP诱导适配...