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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
(A) Cyclic voltammograms (CVs); and (B) differential pulse voltammograms (DPVs) collected at glass carbon (GC) electrode in the solution of ferroceneboronic acid (FBA), avidin and FBA/avidin. The final concentrations of FBA and avidin were 20 and 2 μM, respectively.