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. 2019 Mar 8;9(1):39. doi: 10.3390/bios9010039

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(A) Differential pulse voltammetry (DPV) of various constructed immunosensors for the detection of 300 ng/mL Carcinoembryonic antigen (CEA) fabricated from (a) EG/Antibody@BSA, (b) EG/PPI@Antibody/BSA, (c) EG/CNDTs@Antibody/BSA, and (d) EG/CNDTs@PPI@Antibody/BSA. (B) DPV of various concentrations of CEA from 0.005 to 300 ng/mL in 1 mM [Fe(CN)₆]^3−/4−.