Used in biomedical research to measure activated coagulation factor XII (FXIIa) levels in human plasma or serum samples. This ELISA kit helps investigate the role of FXIIa in blood coagulation, thrombosis, and inflammatory processes. It is particularly useful in studies related to contact activation pathway, hemostasis disorders, and development of antithrombotic therapies. The assay enables quantitative analysis, supporting both clinical research and drug development efforts targeting the intrinsic coagulation pathway.