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F6755 Sigma

Fibrinogen from rat plasma

60-80% protein (≥60% of protein is clottable)

Synonym: Factor I

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Properties

Related Categories Application Index, Biochemicals and Reagents, Coagulation Proteins and Reagents, Enzymes, Inhibitors, and Substrates, Fibrinogen,
quality   60-80% protein (≥60% of protein is clottable)
mol wt   α-chain mol wt 63.5 kDa
  β-chain mol wt 56 kDa
  γ chain mol wt 47 kDa (about 4% carbohydrate content)
  soluble dimer mol wt 340 kDa
storage temp.   −20°C
Gene Information   rat ... Fga(361969), Fgb(24366), Fgg(24367)

Description

Analysis Note

Protein determined by biuret.

Quality

Contains ~12% sodium citrate and ~18% sodium chloride.

Application

Fibrinogen has been used in studies of haemostatic therapy in surgical and massive trauma patients. These studies have shown that fibrinogen may prove to be more superior in stopping blood loss when compared to using fresh frozen plasma (FFP).

Biochem/physiol Actions

Fibrinogen is an acute phase protein that is part of the coagulation cascade of proteins. The end result of the cascade is the production of thrombin that converts fibrinogen to fibrin. Thrombin rapidly proteolyses fibrinogen, releasing fibrinopeptide A. The loss of this small peptide is not sufficient to make the resulting fibrin molecule insoluble, but it tends to form complexes with adjacent fibrin and fibrinogen molecules. Thrombin then cleaves a second peptide, fibrinopeptide B, from fibrin and the fibrin monomers formed then polymerize spontaneously to form an insoluble gel. The polymerized fibrin is held together by noncovalent and electrostatic forces and stabilized by the transamidating enzyme, factor XIIIa, that is produced by the action of thrombin on factor XIII. The insoluble fibrin aggregates (clots) and aggregated platelets then block the damaged blood vessel and prevent further bleeding. The amount of fibrinogen in the plasma can serve as a nonspecific indicator of whether or not an inflammatory process is present in the body. Fibrinogen from any mammalian source will be cleaved by thrombin from any mammalian source.

Price and Availability

Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3

Documents

Certificate of Analysis

Certificate of Origin

Protocols & Articles

Articles

Plasma Derived Proteins and Enzymes

Despite their complexity, blood and plasma are abundant biological resources for the discovery of drug targets and biomarkers for human disease. It is estimated that plasma may contain as many as 40,...
BioFiles 2006, 1.5, 2.
Keywords: Applications, Gas chromatography, Type

Peer-Reviewed Papers
15

References

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92210 Timestrip Plus 0 °C
06693 Timestrip Plus -20 °C

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