Pyruvate oxidase is originated from Aerococcus viridans and used as a component of screen-printed phosphate biosensor for monitoring phosphate concentrations in a sequencing batch reactor (SBR) system. It consumes phosphate in the presence of pyruvate and oxygen and generates hydrogen peroxide, carbon dioxide and acetylphosphate. The enzyme is a flavoprotein with the relatively tightly bound cofactors flavin adenine dinucleotide, thiamine pyrophosphate, and a divalent metal ion, with Mn2+ being the most effective.Activity: 40 units/mg powderOne unit is defined as amount of enzyme required to generate 1 μmol of H2O2 per minute at 37°C, pH 6.5.