Factor V Inhibitor Plasma
Factor V Inhibitor Plasma is manufactured from normal citrated human plasma depleted of Factor V using antibodies directed to FV immobilized on agarose beads. A polyclonal antibody inhibitory to FV has been added to provide FV neutralizing activity. The neutralizing antibody activity is determined by Nijmegen-modified Bethesda Inhibitor Assay and has values reported in Bethesda Units. Our Factor V Inhibitor Plasma is produced with a mild inhibitor titre or neutralizing activity ranging from 1 BU/ml to 10 BU/ml and is available in a frozen format
Only the highest quality citrated plasma is used as starting material and in many cases the parent plasma is available as control material. Our Factor V Inhibitor Plasma can be used for further manufacturing or research use only applications.
Frozen Factor V Inhibitor Plasma
Product Code: INH5-DP
Presentation: Frozen Factor V Inhibitor Plasma
Preparation/Handling: Thaw 1 ml vials in 37oC water bath for 5 minutes; for bulk volumes, thawing time will be dependent on bottle size.
Storage and Stability: Plasma is shipped frozen and should be stored below -60oC. Product is stable until date stated on vial label when stored at -60oC. Once thawed, plasma is stable for 4 hours at 2-8oC in original vial.
Certificate of Analysis: available upon request
Description of Factor V
Factor V (formerly referred to as accelerator globulin and labile factor) is a large glycoprotein (320 kDa) that is produced in the liver. The gene that encodes factor V (FV) is located on chromosome 1. A congenital deficiency of FV is a hemorrhagic disorder inherited as an autosomal recessive disease. The concentration of FV in plasma is typically 10 μg/mL. FV is a pro-cofactor that is activated through limited proteolysis by thrombin, or by activated factor X in the presence of phospholipid surface. Other physiologic activators of FV include plasmin, neutrophil elastase and platelet calpain. The activated cofactor (FVa) is an essential component of the prothrombin activator complex, which consists of FVa, activated factor X, calcium and anionic phospholipid surface. The intact prothrombinase complex activates prothrombin to thrombin at a rate 300,000-fold greater than activated factor X alone. In a positive feedback loop, the thrombin generated accelerates its own generation by activating more FV to FVa. Thrombin also acts to down-regulate FVa indirectly by activating Protein C, which inactivates FVa cofactor activity1-3.
References and Reviews
- Kane WH, Davie EW; Blood Coagulation Factors V and VIII: Structural and functional similarities and their relationship to hemorrhagic and thrombotic disorders. Blood 71:539, 1988.
- Hoyer, LW, Wyshock EG, Colman RW, in Hemostasis and Thrombosis, 3rd Edition, eds. RW Colman, J Hirsh, VJ Marder and EW Salzman, pp. 109-133, J.B. Lippincott Co., Philadelphia, 1994.
- Nesheim ME, Katzmann JA, Tracy PB, Mann KG; in Methods in Enzymology 80:249, 1980.