Coagulation Factor XII, human plasma, is a native coagulation factor XI that once activated (principally by kallikrein), is converted to Factor α-XIIa. Factor α-XIIa then converts Factor XI to Factor XIa.

• Prepared from plasma that has been shown by certified tests to be negative for HBsAg and for antibodies to HIV and HCV
• Purity of single band by SDS-PAGE
• Specific activity is around ≥20 units/mg protein

Specific activity is measured by clotting assay and compared to a standard curve produced using normal pooled human plasma.