Protein S is a vitamin K dependent protein. It is a physiological inhibitor of coagulation.
It acts as a cofactor of activated protein C by promoting the inactivation of FVa and FVIIIa, prothrombin, of the prothrombinase complex, FX.
A protein S deficiency can be either acquired (hepatocellular insufficiency, vitamin K deficiency, anti-protein S antibody, ...) or constitutional (heterozygous or homozygous deficiency) grouped into 2 types depending on whether the deficiency is quantitative (type I) or qualitative (type II).
Special plasmas are derived from patients with acquired deficiency, severe or moderate, or presenting a particular profile. No buffer or preservatives are added.
Quickly frozen at -80° C, the plasma maintains perfectly intact the matrix.
All plasmas are stable when stored at -40° C to -80° C.
We carefully pack with dry ice during shipment.
No additive or preservative.
Expiry date > 1 year.
Plastic vials.
Minimize test time.
Ready to use.
