• Product nameAnti-C9 antibody
    See all C9 primary antibodies
  • Description
    Rabbit polyclonal to C9
  • SpecificityThis product may also detect C9 within the C5b-9 complex, but we have no evidence to show this. Any feedback from our customers is welcome. We recommend ab55811 for specifically detecting the C5b-9 complex.
  • Tested applicationsSuitable for: WBmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide conjugated to KLH derived from within residues 500 to the C-terminus of Human C9.

    (Peptide available as ab71328.)

  • Positive control
    • This antibody gave a positive signal in the following tissue lysates: Kidney (Human) Placenta (Human)


Associated products


Our Abpromise guarantee covers the use of ab64011 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB Use a concentration of 1 µg/ml. Detects a band of approximately 70 kDa (predicted molecular weight: 63 kDa).


  • FunctionConstituent of the membrane attack complex (MAC) that plays a key role in the innate and adaptive immune response by forming pores in the plasma membrane of target cells. C9 is the pore-forming subunit of the MAC.
  • Tissue specificityPlasma.
  • Involvement in diseaseDefects in C9 are a cause of complement component 9 deficiency (C9D) [MIM:613825]. A rare defect of the complement classical pathway associated with susceptibility to severe recurrent infections, predominantly by Neisseria gonorrhoeae or Neisseria meningitidis.
  • Sequence similaritiesBelongs to the complement C6/C7/C8/C9 family.
    Contains 1 EGF-like domain.
    Contains 1 LDL-receptor class A domain.
    Contains 1 MACPF domain.
    Contains 1 TSP type-1 domain.
  • Post-translational
    Thrombin cleaves factor C9 to produce C9a and C9b.
    Phosphorylation sites are present in the extracelllular medium.
  • Cellular localizationSecreted. Cell membrane. Secreted as soluble monomer. Oligomerizes at target membranes, forming a pre-pore. A conformation change then leads to the formation of a 100 Angstrom diameter pore.
  • Information by UniProt
  • Database links
  • Alternative names
    • C9 antibody
    • C9 deficiency antibody
    • C9 deficiency with dermatomyositis antibody
    • CO9_HUMAN antibody
    • Complement component 9 antibody
    • Complement component 9 deficiency antibody
    • Complement component C9 antibody
    • Complement component C9b antibody
    see all

Anti-C9 antibody images

  • All lanes : Anti-C9 antibody (ab64011) at 1 µg/ml

    Lane 1 : Human kidney tissue lysate - total protein (ab30203)
    Lane 2 : Human placenta tissue lysate - total protein (ab29745)

    Lysates/proteins at 10 µg per lane.

    Goat polyclonal to Rabbit IgG - H&L - Pre-Adsorbed (HRP) at 1/3000 dilution

    Performed under reducing conditions.

    Predicted band size : 63 kDa
    Observed band size : 40,70 kDa (why is the actual band size different from the predicted?)

    Exposure time : 10 minutes

References for Anti-C9 antibody (ab64011)

This product has been referenced in:
  • Papareddy P  et al. C-terminal Peptides of Tissue Factor Pathway Inhibitor Are Novel Host Defense Molecules. J Biol Chem 285:28387-98 (2010). WB . Read more (PubMed: 20592020) »

See 1 Publication for this product

Product Wall

Thank you for your inquiry.

I can confirm that both antibodies may also detect C9 within the C5b-9 complex, but we have no evidence to show this. Any feedback from our customers is welcome.

Both antibodieswere raised against an immu...

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Thank you for your enquiry. The reason that the molecular weight is different could be that the C5-b-9 complex degrades under proteolysis and therefore on a western blot, we are only seeing degradation products. In this case, it is the phosphoryla...

Read More