The Effects of pH, Temperature, and the Inhibitor Hydroxylamine on Brassica rapa Peroxidase Enzyme Sriya Bhamidipati Abstract. Peroxidase is an enzyme whose main function is to break down hydrogen peroxide. It is rich in content in the organism Brassica rapa, or the turnip. The purpose of this study was to investigate and observe the effects of pH, temperature conditions and the inhibitor Hydroxylamine on Peroxidase ‘s ability to break down Hydrogen Peroxide. By observing the absorbance change