XANTHINE OXIDASE from Buttermilk, 1 - 4 U/mg protein
Catalase, 1 mg/mL
Catalase occurs in almost all aerobically respiring organisms and serves to protect cells from the toxic effects of hydrogen peroxide.It promotes growth of cells including T-cells, B-cells, myeloid leukemia cells, melanoma cells, mastocytoma cells and normal and transformed fibroblast cells.Defects in catalase are the cause of acatalasemia,a metabolic disorder characterized by absence of catalase activity in red cells and is often associated with ulcerating oral lesions.
Superoxide dismutase, ≥3500 U/mg solid
Superoxide dismutases are enzymes that catalyze the dismutation of superoxide into oxygen and hydrogen peroxide. Thus, they are an important antioxidant defense in nearly all cells exposed to oxygen.Superoxide dismutases are a group of low molecular weight metalloproteins present in all aerobic cells of plants, animals and micro-organisms. They provide protection against damaging reactions with the superoxide radical anion (O2-) by catalyzing its disproportionation into oxygen and hydrogen peroxide.
Glucose-6-phosphate dehydrogenase, ≥400 U/mg solid
Glucose-6-phosphate dehydrogenase, ≥250 U/mg protein