The resulting supernatant was used as enzyme source. 10 毺L of 100% EtOH was added to 100
毺L of tissue extract and then placed in an ice bath for 30 min. After 30 min the tubes were kept at room temperature followed by the addition of 10 毺L of Triton X-100 RS. In a cuvette containing 200 毺L of phosphate buffer and 50 毺L of tissue extract was added 250 毺L of 0.066 M H2O2 (in phosphate buffer) and decreases in optical density was measured at 240 nm for 60 sec in a UV Spectrophotometer. The molar extinction coefficient of 43.6 M cm-1 was used to determine CAT activity. One unit of activity is equal to the moles of H2O2 degraded / mg protein / min.