Protein S Polyclonal Antibody

Protein S (PROS) is a vitamin K-dependent plasma protein that inhibits blood clotting by serving as a cofactor for activated protein C (APC) and facilitates clearance of early apoptotic cells. In the plasma, circulating Protein S becomes inactive upon complexing with C4b-binding protein (C4BP) ; 60-70% of Protein S circulates in complex with C4BP. Calcium-dependent association of C4BP-Protein S with apoptotic cells influences the regulation of complement activation. Protein S has APC-independent anticoagulant activity through direct inhibition of prothrombin activation via interactions with Factor X A, Factor V A and phospholipids. Autosomal dominant Protein S deficiency (levels 15 to 37% of normal) correlates with severe recurrent venous thrombosis.

Preproprotein S; Propiece of latent protein S; PROS 1; PROS; PROS_HUMAN; PROS1; Protein S alpha; Protein Sa; PS 21; PS 22; PS 23; PS 24; PS 25; PS 26; PS21; PS22; PS23; PS24; PS25; PS26; PSA; Vitamin K dependent protein S; Vitamin K-dependent protein S.