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Characterization of thin layers of glucose oxidase
S Bortoluzzi1, M L Di Paolo, A Rigo
1Department of Biological Chemistry, University of Padova.
Abstract:
Glucose Oxidase (GOD) has been covalently bound to functionalized glass cover slips. The surface density of immobilized GOD molecules was measured by a method based on the amperometric determination of Flavin Adenine Dinucleotide (FAD). Atomic Force Microscopy (AFM) images, obtained in aqueous solution for the covalently bound enzyme, show a monomolecular layer of the enzyme on a functionalized glass surface. The catalytic constants were measured for the immobilized GOD and compared with those of the free enzyme.