The direct electrochemistry of myoglobin at a dl-homocysteine self-assembled gold electrode

A pair of well-defined redox waves of myoglobin at a dl-homocysteine self-assembled gold electrode was achieved. Myoglobin can strongly bind to the homocysteine self-assembled gold electrode, so the Mb–Hcy self-assembled gold electrode was prepared and the standard rate constant (ks) of Mb was calculated as 9.3×10−1 s−1. X-ray photoelectron spectroscopy (XPS) measurements demonstrated that Hcy monolayer was formed and Mb was bound to Hcy monolayer.