Fig. 5. (A) SWV current responses of the biosensors to different concentrations of the target miRNA-21 with mismatches (AP-D3D4M2) in HEEFTRA: (a) 0.5 fM, (b) 1.0 fM, (c) 10 fM, (d) 100 fM, (e) 1.0 pM, (f) 10 pM, (g) 100 pM, (h) 1 nM, (i) 10 nM, and (j) 100 nM, and (B) corresponding calibration plot for the SWV peak current vs. lg c.
