【因子Va】天然人血漿因子Va（50 ug）-Factor Va, Human Plasma代理/參數/廠家-重組蛋白-艾美捷科技有限公司

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背景資料: Factor Va is a cofactor for the serine protease factor Xa, and in the presence of calcium ions they collectively assemble on a phospholipid surface to form the prothrombinase complex. The prothrombinase complex is responsible for the rapid conversion of prothrombin to thrombin. Factor Va is derived from the pro-cofactor, factor V, upon limited proteolysis by alpha-thrombin. The thrombin cleavage of factor V liberates two heavily glycosylated activation peptides from the central portion of the molecule which have no cofactor function. Factor Va is comprised of an NH2-terminal derived heavy chain (Mr=94,000) and a COOH-terminal derived light chain (Mr=74,000) which remain associated in the presence of calcium ions. The cofactor binds to phospholipid (cell membrane) surfaces and effectively serves as a receptor for membrane bound factor Xa. Complete assembly of the prothrombinase complex (factor Xa, factor Va, phospholipid, and calcium) results in a 300,000-fold increase in the rate of prothrombin conversion relative to the rate observed with factor Xa alone. The interaction between factor Va and factor Xa is mediated by both the heavy and light chain of factor Va, while the binding of prothrombin to factor Va is mediated solely by the heavy chain.

序列: 天然人血漿Factor Va蛋白產品，又稱Activated protein C cofactor, Proaccelerin (labile factor).其對應NCBI基因號為2153，對應Accession號為P12259.

溶解建議: 天然人血漿Factor Va產品為液體即用型，其溶液組成為：Liquid in 41.3 ul 20 mM HEPES, 150 mM NaC1, pH 7.5, 5 mM CaCl2 +50% glycerol

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