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Herein, we have reported the development of a simple, rapid, and low cost colorimetric method for the detection of antibiotic based on target-activated split peroxidase DNAzyme coupled with dual nicking enzyme signal amplification (NESA). To lower background signal in G-quadruplex DNAzyme-based detection, the two split G-rich parts are caged into two different hairpin probes, respectively, preventing...
The authors describe a label-free electrochemical aptasensor for ultrasensitive and highly specific detection of the antibiotic based on cascade enzymatic recycling couple with DNAzyme amplification. The assay involves two sequential reactions: the first reaction is a λ exonuclease-assisted cyclic digestion reaction triggered by target-aptamer binding. The second reaction is a nicking endonuclease-aided...
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