Human Coagulation Factor XI PRODUCT INQUIRY Domain Structure of Factor XI The domain structure of the factor XI monomer is represented. The areas identified as R1 through R4 correspond to four tandem amino acid sequence repeats which ultimately comprise the heavy chain of factor XIa. During proteolytic activation by factor XIIa, the "CATALYTIC DOMAIN", which comprises the light chain of factor XIa, is cleaved from the heavy chain region. The heavy and light chains of factor XIa remain associated through a disulfide bond. The mature factor XI molecule is a homodimer composed of two apparently identical monomers which remain associated through disulfide bonds. HCXI-0150 Human Factor XI Pricing: Please Inquire SAMPLE DATA SHEET | SAFETY DATA SHEET Size 50 µg Formulation 50% glycerol/water (v/v) Storage -20°C Purity >95% by SDS-PAGE Activity Determination Clotting assay Shelf Life (properly stored) 12 months