Catalase, superoxide dismutase and ascorbate glutathione cycle enzymes confer drought tolerance of Amaranthus tricolor Scientific Reports ' , ! activates the body's Several lines of antioxidant defense against oxidative stress: antioxidant enzymes, nanomaterials with multiple enzyme mimicking activities, and low molecular weight antioxidants Archives of Toxicology Springer Nature Link Intracellular catalase activity instead of glutathione level dominates the resistance of cells to reactive oxygen species Cell Stress and Chaperones Springer Nature Link First line defence antioxidants superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX): Their fundamental role in the entire antioxidant defence grid ScienceDirect