Used in biomedical research to measure levels of human α1-anticoagulant protein (also known as alpha-1-antitrypsin or ACT) in biological samples such as plasma, serum, or cell culture supernatants. The kit enables researchers to assess ACT concentration in studies related to inflammation, coagulation disorders, liver disease, and lung conditions like emphysema. It is particularly valuable in clinical research settings where precise quantification of this serine protease inhibitor helps evaluate disease progression, response to therapy, or immune system modulation. The ELISA format allows for high sensitivity, specificity, and throughput in laboratory analysis.