Invitrogen™ Human Protein S (aa 280-425) Control Fragment Recombinant Protein

Description

Highest antigen sequence indentity to the following orthologs: Mouse (79%), Rat (79%). This recombinant protein control fragment may be used for blocking experiments with the corresponding antibody, PA5-110896 (PA5-110896. In IHC/ICC and WB experiments, we recommend a 100x molar excess of the protein fragment control based on the concentration and the molecular weight. Pre-incubate the antibody-protein control fragment mixture for 30 min at room temperature.

Protein S is a vitamin K-dependent, potent neutral anticoagulant plasma glycoprotein. Protein S has a molecular weight of approximately 70 kDa and consists of a single polypeptide chain. The concentration of protein S in human plasma is 25 μg/mL, with a half-life of approximately two days. About 40% of Protein S in plasma is in a free form, whereas 60% is complexed with C4b-binding Protein (C4BP). Only the free Protein S functions as a cofactor to antigen presenting cells (APC) in the APC-dependent degradation of Factor Va and Factor VIIIa.