Fibrinopeptide A (FPA)

Size

£297.00

SKU:: F4206-01A
Purity:: Purified by caprylic acid and ammonium sulfate precipitations and solid-phase adsorption to remove unwanted crossreactivity.
Storage Conditions:: -20°C
Supplier:: United States Biological
Host:: Sheep
Immunogen:: Synthetic fibrinopeptide corresponding to aa1-16 conjugated to carrier.
Format:: Supplied as a liquid in 0.01M HEPES, pH 7.4, 0.15M sodium chloride, 50% glycerol.
Extra Details:: Fibrinogen is an abundant plasma protein (5-10uM) produced in the liver. The intact protein has a molecular weight of 340kD and is composed of 3 pairs of disulphide-bound polypeptide chains named Aα, Bβ and γ. Fibrinogen is a triglobular protein consisting of a central E domain and terminal D domains. Proteolysis by thrombin results in release of Fibrinopeptide A (FPA, Aα1-16) followed by Fibrinopeptide B (FPB, Bβ1-14) and the fibrin monomers that result polymerize in a half-overlap fashion to form insoluble fibrin fibrils. The chains of fibrin are referred to as α, β and γ, due to the removal of FPA and FPB. The polymerised fibrin is subsequently stabilized by the transglutaminase activated Factor XIII that forms amide linkages between γ chains and, to a lesser extent, α chains of the fibrin molecules. Proteolysis of fibrinogen by plasmin initially liberates C- terminal residues from the Aα chain to produce fragment X (intact D- E-D, which is still clottable). Fragment X is further degraded to non- clottable fragments Y (D-E) and D. Fragment Y can be digested into its constituent D and E fragments. Digestion of non-crosslinked fibrin with plasmin is very similar to the digestion of fibrinogen, which results in production of fragments D and E. Degradation of crosslinked fibrin by plasmin results in fragment DD (D-Dimer consisting of the D domains of 2 fibrin molecules crosslinked via the γ chains), fragment E (central E domain) as well as DDE in which fragment E is non-covalently associated with DD. For human crosslinked fibrin, the relative weights of the cleavage fragments produced are: 184kD for fragment DD, 92kD for D, 50kD for E, 1.54kD for FPA and 1.57kD for FPB. Application: Suitable for use in ELISA. Other applications not tested. Recommended Dilutions: Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

Shipping Conditions:: Blue Ice