beta-D-glucose + O2 = D-glucono-1,5-lactone + H2O2 Homodimer. This enzyme is widely applied for the determination of glucose in body fluids and in removing residual glucose or oxygen from foods and beverages. Furthermore, glucose oxidase-producing molds such as aspergillus and penicillium species are used for the biological production of gluconic acid. Belongs to the GMC oxidoreductase family.