SERPINF2 and Venous thrombosis: In contrast to previous results with α2AP(13-42)-HSA, radiolabeled tracer XL5-HSA was found to a greater extent in experimentally-induced intravascular clots in both murine and rabbit in vivo venous thrombosis models; importantly, the majority of clot-associated XL5-HSA and plasma-derived α2AP, but not recombinant HSA, was shown to be insoluble to 5.0 M urea, suggesting covalent cross-linking.