Figure 12: Effect of fisetin and MCN-fisetin on the production of catalase in lung tissue. The sample was added to 0.01M phosphate buffer (pH 7.0), 0.2M hydrogen peroxide and water. The reaction was stopped with dichromate/acetic acid reagent, and absorbance was measured at 610nm in a spectrophotometer. Concentration of catalase was determined from a standard curve.