Reversible conformational change of cytochrome c at a modified gold electrode in methanol

Changes in the secondary structure of cytochrome c on immersion in methanol were monitored using circular dichroism. These changes occurred immediately in methanol, upon re-immersion in aqueous buffer, the secondary structure was restored in ca. 45 min. This method enables the secondary structure of proteins in non-aqueous solvents to be monitored in real time.