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. 2020 Nov 4;20(21):6289. doi: 10.3390/s20216289

Figure 4.

Figure 4

(a) Paper platform for the detection of miR-21. (b) Case where the target is not detected, the fluorescence is quenched and the color changes from orange to purple. (c) Case where the target miRNA is detected and orange fluorescence is maintained. Reproduced with permission [37]. Copyright 2012 American Chemical Society.