Peroxidase from horseradish is widely used in biochemical research and diagnostic applications due to its ability to catalyze the oxidation of various substrates in the presence of hydrogen peroxide. It is a key component in enzyme-linked immunosorbent assays (ELISAs) for detecting antibodies, antigens, and other biomolecules, providing high sensitivity and specificity. In molecular biology, it is employed in blotting techniques like Western blotting to visualize proteins. Additionally, it is utilized in histochemistry for staining tissue samples to study cellular and molecular structures. Its applications also extend to biosensors for detecting environmental pollutants and in the food industry for quality control and safety testing.