Used in biomedical research to quantitatively measure levels of human aprotinin in biological samples such as plasma, serum, or cell culture supernatants. This ELISA kit enables researchers to assess aprotinin concentration in studies related to inflammation, fibrinolysis, and tissue injury. It is particularly useful in clinical research settings investigating conditions like sepsis, acute kidney injury, or post-surgical complications where aprotinin's role as a serine protease inhibitor may influence outcomes. The assay provides high sensitivity and specificity, allowing for accurate detection even at low concentrations, supporting reproducible results in large-scale studies.