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Invitrogen
Human C4BPB (aa 43-118) Control Fragment Recombinant Protein
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Product Details
RP-94168
Species
Expression System
Amino acid sequence
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Conjugate
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Product Specific Information
Highest antigen sequence indentity to the following orthologs: Mouse (36%), Rat (36%).
This recombinant protein control fragment may be used for blocking experiments with the corresponding antibody, PA5-62443. In IHC/ICC and WB experiments, we recommend a 100x molar excess of the protein fragment control based on the concentration and the molecular weight. Pre-incubate the antibody-protein control fragment mixture for 30 min at room temperature.
Target Information
Complement component 4-binding protein (C4BP) is a plasma glycoprotein that inhibits the classical pathway of complement activation, which is mediated through antibody targeting of foreign antigen. Structurally, C4BP is a disulfide linked, multimeric protein that is composed of seven alpha chains and one beta chain. C4BP functions as a cofactor for C3beta inactivator in the cleavage of C3beta, and accelerates the decay of C4betaC2alpha (C3 convertase) by acting as a cofactor in the cleavage of C4beta by factor I. Streptococcal strains that express Ig-binding cell surface molecules, which are members of the M protein family, can bind to overlapping C4beta binding sites in C4BP and therefore, interfere with the classical pathway of complement activation. Bacteria-bound C4BP may be an evolved mechanism that downregulates complement activation in the bacterial host microenvironment, thereby reducing the occurrences of bacterial opsonization and phagocytosis.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
References (0)
Bioinformatics
Protein Aliases: C4b-binding protein beta chain
Gene Aliases: C4BP; C4BPB
UniProt ID: (Human) P20851
Entrez Gene ID: (Human) 725
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