Catalase-peroxidase is an enzyme that plays a crucial role in protecting cells from oxidative damage. It catalyzes the breakdown of hydrogen peroxide, a harmful byproduct of various metabolic processes, into water and oxygen. This dual function helps maintain cellular health by preventing the accumulation of toxic substances. This enzyme is particularly important in certain bacteria and plants, where it aids in survival under stressful conditions. Catalase-peroxidase is encoded by specific genes, and its activity can vary among different organisms, reflecting their adaptation to environmental challenges and oxidative stress.