Anti-Fibrinogen beta chain/FGB Antibody Picoband® Fluoro647 Conjugated

Fibrinogen beta chain, mapped to 4q31.3, is also known as FGB. The protein encoded by this gene is the beta component of fibrinogen, a blood-borne glycoprotein comprised of three pairs of nonidentical polypeptide chains. Following vascular injury, fibrinogen is cleaved by thrombin to form fibrin which is the most abundant component of blood clots. In addition, various cleavage products of fibrinogen and fibrin regulate cell adhesion and spreading, display vasoconstrictor and chemotactic activities, and are mitogens for several cell types. Mutations in this gene lead to several disorders, including afibrinogenemia, dysfibrinogenemia, hypodysfibrinogenemia and thrombotic tendency. Alternatively spliced transcript variants encoding different isoforms have been found for this gene.

A synthetic peptide corresponding to a sequence in the middle region of human FGB, different from the related mouse sequence by three amino acids, and from the related rat sequence by five amino acids.

Cleaved by the protease thrombin to yield monomers which, together with fibrinogen alpha (FGA) and fibrinogen gamma (FGG), polymerize to form an insoluble fibrin matrix. Fibrin has a major function in hemostasis as one of the primary components of blood clots. In addition, functions during the early stages of wound repair to stabilize the lesion and guide cell migration during re-epithelialization. Was originally thought to be essential for platelet aggregation, based on in vitro studies using anticoagulated blood. However subsequent studies have shown that it is not absolutely required for thrombus formation in vivo. Enhances expression of SELP in activated platelets. Maternal fibrinogen is essential for successful pregnancy. Fibrin deposition is also associated with infection, where it protects against IFNG-mediated hemorrhage. May also facilitate the antibacterial immune response via both innate and T-cell mediated pathways. .

1. Entrez Gene: FGB fibrinogen beta chain. 2. Chung, D. W., Que, B. G., Rixon, M. W., Mace, M., Jr., Davie, E. W. Characterization of complementary deoxyribonucleic acid and genomic deoxyribonucleic acid for the beta chain of human fibrinogen. Biochemistry 22: 3244-3250, 1983. 3. Spena, S., Duga, S., Asselta, R., Malcovati, M., Peyvandi, F., Tenchini, M. L. Congenital afibrinogenemia: first identification of splicing mutations in the fibrinogen B-beta-chain gene causing activation of cryptic splice sites. Blood 100: 4478-4484, 2002.