Human blood coagulation factor IX. Purification, properties, and mechanism of activation by activated factor XI.
نویسندگان
چکیده
منابع مشابه
Human blood coagulation factor XI. Purification, properties, and mechanism of activation by activated factor XII.
Human blood coagulation Factor XI was purified in 20% yield from plasma by ion exchange chromatography. The specific clotting activity of purified Factor XI was 250 & 20 units/mg implying that its concentration in normal titrated human plasma is 4 pg/ml. The purified Factor XI in its precursor form gave a single protein band on polyacrylamide gels in the presence of sodium dodecyl sulfate with ...
متن کاملFactor XI: purification from porcine plasma by affinity chromatography and some properties of factor XI and activated factor XI.
Porcine factor XI and activated factor XI were purified by the introduction of affinity chromatography on high molecular mass kininogen. On the affinity chromatography, it was observed that high affinity exists between porcine factor XI and high molecular mass kininogen. In the preparation, however, factor XII, plasma prekallikrein and high molecular mass kininogen were not detected. The factor...
متن کاملThe effect of platelets in the activation of human blood coagulation factor IX by factor XIa.
We report here the effect of activated human platelets on the activation of human factor IX by human factor XIa. Factor IXa formed during activation was determined via its ability to activate bovine factor X. To increase sensitivity, phospholipids and bovine factor VIIIa were present in the assay. The kinetic parameters of the factor IX activation were determined in the presence of 10 mmol/L Ca...
متن کاملPurification and Properties of Human Coagulation Factor
Blood coagulation Factor M was purified 100,000fold from fresh frozen human plasma to apparent homogeneity with a yield of 30% based on coagulation assay. The molecular weight estimated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis was 48,000. Factor VI1 is composed of a single polypeptide chain with the NHz-terminal sequence Ala-Asn-AlaPhe-Leu-(G1a)-(Gla)-Leu-(Arg)-Pro. It is co...
متن کاملActivation of Human Blood Coagulation Factor XI Independent of Factor XI1
Human blood coagulation factor XI was activated by either autoactivation or thrombin. These reactions occurred only in the presence of negatively charged materials, such as dextran sulfate (-Mr 500,000), sulfatide, and heparin. During the activation, factor XI was cleaved at a single Arg-Ile bond by thrombin or factor XIa to produce an amino-terminal 50-kDa heavy chain and a carboxyl-terminal 3...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1978
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(17)34560-x