
1) Coagulase
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https://www.crosswordclues.com/clue/thrombin

Thrombin ({EC number|3.4.21.5}, fibrinogenase, thrombase, thrombofort, topical, thrombin-C, tropostasin, activated blood-coagulation factor II, blood-coagulation factor IIa, factor IIa, E thrombin, beta-thrombin, gamma-thrombin) is a serine protease that in humans is encoded by the F2 gene. Prothrombin (coagulation factor II) is proteolytically cl...
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http://en.wikipedia.org/wiki/Thrombin

• (n.) The fibrin ferment which produces the formation of fibrin from fibrinogen.
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http://thinkexist.com/dictionary/meaning/thrombin/

(from the article `coagulation`) Once formed, prothrombin activator initiates the conversion of prothrombin to thrombin. Thrombin, in turn, catalyzes the conversion of fibrinogena ... ...under normal conditions. Blood-clotting proteins circulate in the blood plasma in an inactive form, poised to participate in blood coagulation .....
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http://www.britannica.com/eb/a-z/t/45

A blood enzyme that converts fibrinogen to fibrin in the process of blood clotting.
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http://www.daviddarling.info/encyclopedia/T/thrombin.html

the final chain in the series of blood clotting forms fibrin from fibrinogen. Thrombin is formed from prothrombin by a prothrombin activator, itself the end of a series of reactions. This cascade of events may begin two ways. One, is the release of tissue factors from damaged vessels. The other, is the activation of factors in blood platelets which...
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http://www.encyclo.co.uk/local/20169

<enzyme> Protease (34 kD) generated in blood clotting that acts on fibrinogen to produce fibrin. Consists of two chains, A and B, linked by a disulphide bond. B chain has sequence homology with pancreatic serine proteases: cleaves at Arg Gly. ... Thrombin is produced from prothrombin by the action either of the extrinsic system (tissue factor...
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http://www.encyclo.co.uk/local/20973

(throm´bin) the activated form of prothrombin (factor II), which catalyzes the conversion of fibrinogen to fibrin. a preparation of this compound prepared from prothrombin of bovine origin, used as a topical hemostatic.
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http://www.encyclo.co.uk/local/21001

Protease (34 kD) generated in blood clotting that acts on fibrinogen to produce fibrin. Consists of two chains, A and B, linked by a disulphide bond. B-chain has sequence homology with pancreatic serine proteases: cleaves at Arg-Gly. Thrombin is produced from prothrombin by the action either of the extrinsic system (tissue factor + phospholipid) or, more importantly, the intrinsic system (contact of blood with a foreign surface or connective tissue). Both extrinsic and intrinsic systems activate plasma Factor X to form Factor Xa which then, in conjunction with phospholipid (tissue derived or platelet factor 3) and Factor V, catalyses the conversion. See also Table F1.
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http://www.encyclo.co.uk/visitor-contributions.php
Throm'bin noun [ See
Thrombus .]
(Physiol. Chem.) The fibrin ferment which produces the formation of fibrin from fibrinogen.
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http://www.encyclo.co.uk/webster/T/50

Type: Term Pronunciation: throm′bin Definitions: 1. An enzyme (proteinase), formed in shed blood, that converts fibrinogen into fibrin by hydrolyzing peptides (and amides and esters) of l-arginine; formed from prothrombin by the action of prothrombinase (factor Xa, another proteinase). 2. A sterile protein substance prepared from prothrombin ...
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http://www.medilexicon.com/medicaldictionary.php?t=91787

Thrombin: A key clot promoter, thrombin is an enzyme that presides over the conversion of a substance called fibrinogen to fibrin, the right stuff for a clot.
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http://www.medterms.com/script/main/art.asp?articlekey=5764

[
n] - an enzyme that acts on fibrinogen in blood causing it to clot
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http://www.webdictionary.co.uk/definition.php?query=thrombin
noun an enzyme that acts on fibrinogen in blood causing it to clot
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https://www.encyclo.co.uk/local/20974
No exact match found.