Used in research settings to quantify levels of human vascular hemophilia factor A domain protein 1 (vWA1) in biological samples such as plasma or serum. This ELISA kit enables detection and measurement of vWA1, which plays a role in platelet adhesion and blood coagulation. It is particularly useful in studies related to von Willebrand disease, thrombosis, and other bleeding disorders. The assay supports investigation into endothelial cell function and vascular injury responses by providing a reliable, sensitive, and specific method for monitoring vWA1 concentration in experimental or clinical samples.