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. Author manuscript; available in PMC: 2018 Aug 11.
Published in final edited form as: ACS Appl Mater Interfaces. 2018 Jul 6;10(28):23490–23500. doi: 10.1021/acsami.8b02837

Figure 3.

Figure 3.

Competitive displacement indicates reversible recognition of surface-tethered dopamine by the dopamine aptamer. (A) Inhibitory dose-response curve for surface-tethered dopamine vs. free dopamine. Error bars are standard errors of the means for N=4 substrates for tethered vs. in solution dopamine and N=2 for control conditions and are too small to be visualized in some cases. Schematics (not to scale) for (B) the positive control with incorrect target, L-tryptophan, in solution and (C) the negative control with the incorrect target, L-tryptophan, tethered.