ELECTROCHEMICAL ADSORPTION OF PEPTIDES AS PROMOTERS OF DIRECT ELECTRON-TRANSFER IN SOLUTIONS WITH DIFFERENT PH ELECTROCHEMICAL STUDIES

Cyclic voltammetry was used to study the effects of solution pH and el ectrode potential on the direct electrochemical reactions of cytochrom e c at dipeptide-modified gold electrodes. The quasi-reversible redox reaction of cytochrome c is most stable after a modification of the el ectrode surface in neutral peptide solutions. Electrode polarization t o negative potentials during modification improves the redox reaction signals.