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Coagulation factor X (EC 3.4.21.6), or Stuart factor, is an enzyme of the coagulation cascade, ... The half life of factor X is 40–45 hours. Structure
2157 14069 Ensembl ENSG00000185010 ENSMUSG00000031196 UniProt P00451 Q06194 RefSeq (mRNA) NM_000132 NM_019863 NM_001161373 NM_001161374 NM_007977 RefSeq (protein) NP_000123 NP_063916 NP_001154845 NP_001154846 NP_032003 Location (UCSC) Chr X: 154.84 – 155.03 Mb Chr X: 74.22 – 74.43 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Coagulation factor VIII (Factor VIII, FVIII, also ...
Factor XI (FXI) is produced by the liver and circulates as a homo-dimer in its inactive form. [9] The plasma half-life of FXI is approximately 52 hours. The zymogen factor is activated into factor XIa by factor XIIa (FXIIa), thrombin, and FXIa itself; due to its activation by FXIIa, FXI is a member of the "contact pathway" (which includes HMWK, prekallikrein, factor XII, factor XI, and factor IX).
Factor V is produced by megakaryocytes, which produce platelets and platelet-derived factor V, and hepatocytes, which produce plasma-derived factor V. [9] The molecule circulates in plasma as a single-chain molecule with a plasma half-life of 12–36 hours. [10] Factor V is able to bind to activated platelets and is activated by thrombin.
This measures the quality of the extrinsic pathway (as well as the common pathway) of coagulation. The speed of the extrinsic pathway is greatly affected by levels of functional factor VII in the body. Factor VII has a short half-life and the carboxylation of its glutamate residues requires vitamin K.
Fibrinogen (coagulation factor I) is a glycoprotein complex, ... Fibrinogen has a circulating half-life of ~4 days. [12] Blood clot formation ...
[4] [1] Its biological half-life is 90 minutes and it persists in blood for a few hours after formation. [4] [3] [1] The half-life of F1+2 is relatively long, which makes it more reliable for measuring ongoing coagulation than other markers like thrombin–antithrombin complexes and fibrinopeptide A.
The coagulation factors are generally enzymes called serine proteases, which act by cleaving downstream proteins. The exceptions are tissue factor, FV, FVIII, FXIII. [28] Tissue factor, FV and FVIII are glycoproteins, and Factor XIII is a transglutaminase. [27] The coagulation factors circulate as inactive zymogens. The coagulation cascade is ...