F4753
Fibrinogen from bovine plasma
55-70% protein (≥ 90% of protein is clottable)
Synonym(s):
Factor I
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About This Item
biological source
bovine plasma
form
powder
quality
55-70% protein (≥ 90% of protein is clottable)
mol wt
α-chain 63.5 kDa, β-chain 56 kDa, γ chain 47 kDa (about 4% carbohydrate content), soluble dimer 340 kDa
concentration
55-70% protein (biuret)
storage temp.
−20°C
Gene Information
cow ... FGA(522039), FGB(510522), FGG(280792)
Biochem/physiol Actions
Acute phase protein that is part of the coagulation cascade of proteins.
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 proteolyzes 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.
Analysis Note
Contains ~15% sodium citrate and ~25% sodium chloride.
Protein determined by biuret
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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