Influence of bovine immunoglobulin G on faradaic reactions at electrodes

Abstract

The effect of bovine immunoglobulin G (lgG), adsorbed on different electrode materials, on faradaic reactions of hexacyanoferrate(III)-hexacyanoferrate(II), hydroquinone-benzoquinone, nicotinamide adenine dinu-cleotide, reduced form (NADH), and phenol is described and discussed. The reactions are partially inhibited by lgG, but the current and peak potentials reach protein-independent values for higher concentrations of lgG. The hydroquinone-benzoquinone couple can be used for detection purposes at lgG-covered electrodes in electrochemical immunoassays.