Human Complement Factor H-related 4/CFHR4 Alexa Fluor® 488-conjugated Antibody

  
  • Species Reactivity
    Human
  • Specificity
    Detects human Complement Factor H-related 4/CFHR4 in direct ELISAs and Western blots. In direct ELISAs, no cross-reactivity with recombinant human (rh) CFHR1, rhCFHR2, or rhCFHR5 is observed.
  • Source
    Monoclonal Mouse IgG1 Clone # 640212
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    S. frugiperda insect ovarian cell line Sf 21-derived recombinant human Complement Factor H-related 4/CFHR4
    Glu20-Glu331
    Accession # Q92496
  • Formulation
    Supplied in a saline solution containing BSA and Sodium Azide.
  • Label
    Alexa Fluor 488
Applications
  •  
    Recommended
    Concentration
    Sample
  • Intracellular Staining by Flow Cytometry
    5 µL/106 cells
    See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples
Intracellular Staining by Flow Cytometry
Detection of Complement Factor H‑related 4/CFHR4 in HepG2 Human Cell Line by Flow Cytometry. HepG2 human hepatocellular carcinoma cell line was stained with Mouse Anti-Human Complement Factor H‑related 4/CFHR4 Alexa Fluor® 488‑conjugated Monoclonal Antibody (Catalog # IC5980G, filled histogram) or isotype control antibody (Catalog # IC002G, open histogram). View our protocol for Staining Intracellular Molecules.
Preparation and Storage
  • Shipping
    The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
  • Stability & Storage
    Protect from light. Do not freeze.
    • 12 months from date of receipt, 2 to 8 °C as supplied.
Background: Complement Factor H-related 4/CFHR4

FHR4 (Complement factor H-related protein 4), also known as CFHR4, is an 84-86 kDa glycoprotein member of group 2 in the  factor H-related protein family of molecules. It is synthesized by hepatocytes and circulates in plasma as a monomer. FHR4 binds to lipoproteins (LDL and VLDL), C3b and C3d, and to native (pentameric) C-reactive protein (pCRP). In addition to full-length 86 kDa CFHR4 (called FHR4A), there are two alternative splice forms. One simply shows a deletion of Glu20 relative to the full-length form. A second called FHR4B is 42-45 kDa in size, and shows a deletion of amino acids (aa) 60-306 within the mature CFHR4 molecule. This short isoform is the molecule used as the immunogen for clone 640212. This 312 aa short form contains five Sushi/SCR domains, the first of which (aa 23-85) is associated with pCRP binding. Both major isoforms appear to show the same activity. That is, they serve as a platform for C3 convertase assembly, and bind pCRP which leads to classical complement activation. Over aa 20-331, human CFHRB shares 47% aa identity with a related molecule found in rat.

  • Entrez Gene IDs:
    10877 (Human)
  • Alternate Names:
    complement factor H-related protein 4; CFHL4; CFHR4; Complement Factor Hrelated 4; Complement Factor H-related 4; FHR4; FHR-4
Related Research Areas
Isotype Controls
Description Application Cat# Citations Images  

Mouse IgG1 Alexa Fluor® 488-conjugated Antibody

Ctrl IC002G 3  
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Staining Reagents
Description Application Cat# Citations Images  

Flow Cytometry Permeabilization/Wash Buffer I (1X)

Flow FC005 5
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Flow Cytometry Fixation Buffer (1X)

Flow FC004 3
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Flow Cytometry Fixation & Permeabilization Buffer Kit I

Flow FC009 3
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Flow Cytometry Fixation/Permeabilization Buffer I (1X)

Flow FC007 2
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