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. 2017 Sep 11;7:11238. doi: 10.1038/s41598-017-11680-5

Figure 2.

Figure 2

(A) DPVs recorded using the aptasensor in Tris before (red line) and after (black lines) binding with different concentrations of PSA of 0.125, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0, 16, 32, 64 and 128 ng mL−1. The arrow shows the direction of PSA concentration increment. (B) The dependency of the peak current on the PSA concentration (the calibration curve).