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. 2021 Mar 8;11(3):399. doi: 10.3390/biom11030399

Figure 2.

Figure 2

(a) A scheme of fluorescence DNA biosensor to detect Hg2+ based on Exo III-assisted signal amplification and silver nanoclusters. Reprinted with permission from [43]. Copyright 2019 Springer Nature. (b) A scheme of a label-free fluorescence DNA biosensor for detection Hg2+ based on Exo III-aided signal amplification and G-quadruplex DNA [26]. (c) A scheme of a colorimetric DNA biosensor for the detection of Hg2+ using Exo III-assisted signal amplification and AuNPs. Reprinted with permission from [46]. Copyright 2017 Springer Nature. (d) A scheme of a homogeneous electrochemical DNA biosensor for Hg2+ determination based on Exo III-assisted recycling amplification and indium tin oxide (ITO) electrode. Reprinted with permission from [47]. Copyright 2018 Royal Society of Chemistry.