Used in biomedical research to quantify levels of human α1-antichymotrypsin (AACT) in biological samples such as serum, plasma, and cell culture supernatants. This ELISA kit enables researchers to study AACT's role in inflammatory processes, neurodegenerative diseases like Alzheimer's, and certain cancers where AACT expression is elevated. It is particularly valuable in clinical and preclinical studies assessing acute phase response and protease-antiprotease imbalance. The assay provides a sensitive and specific means to monitor disease progression and evaluate therapeutic interventions targeting inflammatory pathways.