Spectroelectrochemical study of heme- and molybdopterin cofactor-containing chicken liver sulphite oxidase
Electron transfer (ET) in sulphite oxidase (SOx), a heme- and molybdopterin cofactor-containing enzyme, was studied spectroelectrochemically using capillary gold electrode modified with aldrithiol. Direct electron exchange between SOx and the surface of modified gold was observed, with a formal potential of -115 mV vs. AgAgCl, KClsat at pH 7.0. This value agreed well with that previously reported