The isolation of prothrombin, factor IX and factor X from human factor IX concentrates
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A relatively simple and reproducible procedure is described for the isolation of functionally and electrophoretically homogeneous prothrombin, factor IX and factor X from clinical Factor IX Concentrates. The procedure involves ammonium sulphate fractionation; then chromatography on DEAE-Sephadex A50, dextran sulphate-Sepharose and heparin-Sepharose. High recovery of all three procoagulants was obtained: 32% for factor IX; 32% for factor X; 29% for prothrombin.
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