G-triplex/hemin DNAzyme mediated colorimetric aptasensor for Escherichia coli O157:H7 detection based on exonuclease III-assisted amplification and aptamers-functionalized magnetic beads

Lidong Pang, Ling'e Wang, Yaqi Liang, Zhenghui Wang, Wei Zhang, Qianyu Zhao, Xinyan Yang, Yujun Jiang