Used in biomedical research to quantify levels of human antitrypsin in biological samples such as serum, plasma, or cell culture supernatants. Enables researchers to study antitrypsin's role in inflammatory processes, liver disease, and alpha-1 antitrypsin deficiency. Commonly applied in clinical labs and research settings to assess immune response, monitor disease progression, and evaluate therapeutic efficacy. Provides a sensitive and specific method for detecting low concentrations of antitrypsin, supporting studies in respiratory diseases like emphysema and chronic obstructive pulmonary disease (COPD).