• Product nameAnti-C1q antibody (FITC)
    See all C1q primary antibodies
  • Description
    Rabbit polyclonal to C1q (FITC)
  • ConjugationFITC. Ex: 493nm, Em: 528nm
  • SpecificityThis antibody reacts with human C1q complement.
  • Tested applicationsSuitable for: Flow Cyt, IHC-P, ICC/IFmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    C1q isolated from the normal human serum.

  • General notes

    Fluorescein isothiocyanate (FITC) isomer 1.



Our Abpromise guarantee covers the use of ab4223 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
Flow Cyt Use at an assay dependent concentration. PubMed: 21746929
IHC-P Use at an assay dependent concentration.
ICC/IF Use at an assay dependent concentration. PubMed: 22393049


  • FunctionC1q associates with the proenzymes C1r and C1s to yield C1, the first component of the serum complement system. The collagen-like regions of C1q interact with the Ca(2+)-dependent C1r(2)C1s(2) proenzyme complex, and efficient activation of C1 takes place on interaction of the globular heads of C1q with the Fc regions of IgG or IgM antibody present in immune complexes.
  • Involvement in diseaseDefects in C1QA are a cause of complement component C1q deficiency (C1QD) [MIM:613652]. A rare defect resulting in C1 deficiency and impaired activation of the complement classical pathway. C1 deficiency generally leads to severe immune complex disease with features of systemic lupus erythematosus and glomerulonephritis.
  • Sequence similaritiesContains 1 C1q domain.
    Contains 1 collagen-like domain.
  • Post-translational
    O-linked glycans consist of Glc-Gal disaccharides bound to the oxygen atom of post-translationally added hydroxyl groups.
  • Cellular localizationSecreted.
  • Information by UniProt
  • Database links
  • Alternative names
    • C1qa antibody
    • C1QA_HUMAN antibody
    • C1QB antibody
    • C1QC antibody
    • Complement C1q subcomponent subunit A antibody
    • Complement C1q subcomponent subunit B antibody
    • Complement C1q subcomponent subunit C antibody
    • Complement component 1 q subcomponent alpha polypeptide antibody
    • Complement component C1q A chain antibody
    • Complement component C1q B chain antibody
    • Complement component C1q C chain antibody
    see all

Anti-C1q antibody (FITC) images

  • C1q isolated from the NHS. This antibody reacts with the Human C1q complement. Traces of contaminating antibodies have been removed by solid phase absorption with human plasma proteins. This antibody is well suited for tissue section staining but may also be used for other applications.

  • ab4223, staining C1q in CHO-K1 cells transfected with M1-AQP4 or M23-AQP4 by Immunocytochemistry/ Immunofluorescence.

    Cells were incubated at room temperature with recombinant monoclonal NMO antibody and 120 µg/ml human C1q protein (ab96363). Cells were washed with PBS, fixed in paraformaldehyde and permeabilized with 0.1% Triton X-100. Cells were blocked with 1% BSA for 30 min and incubated for 60 min with primary antibody against C1q (ab4223) at 1/200 dilution.

References for Anti-C1q antibody (FITC) (ab4223)

This product has been referenced in:
  • Fox S  et al. The role of C1q in recognition of apoptotic epithelial cells and inflammatory cytokine production by phagocytes during Helicobacter pylori infection. J Inflamm (Lond) 12:51 (2015). Read more (PubMed: 26357509) »
  • Phuan PW  et al. Complement-dependent Cytotoxicity in Neuromyelitis Optica Requires Aquaporin-4 Protein Assembly in Orthogonal Arrays. J Biol Chem 287:13829-39 (2012). ICC/IF . Read more (PubMed: 22393049) »

See all 3 Publications for this product

Product Wall

Application Western blot
Loading amount 0.06 µg
Gel Running Conditions Reduced Denaturing
Sample Mouse Serum (Serum)
Specification Serum
Blocking step Milk as blocking agent for 30 hour(s) and 0 minute(s) · Concentration: 5%

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Verified customer

Submitted Jul 15 2014

Application Immunohistochemistry (Frozen sections)
Blocking step (agent) for 10 minute(s) · Concentration: 4% · Temperature: 25°C
Sample Dog Tissue sections (spleen)
Specification spleen
Permeabilization No
Fixative Acetone

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Verified customer

Submitted Jul 01 2014

Thank you for contacting us.

My colleague has confirmed that we do not currently OEM any of our products for resale. If you are interested in using our products to develop other assays such as kits, my colleagues at mailto:sales@abcam.com can...

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Gracias por contactarnos de nuevo, ¡no es ninguna molestia!

He revisado los artículos referenciados en la datasheet del producto, y para ICC/IF la dilución recomendada es de 1/200. Te copio el párrafo correspondient...

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Approximately 1 mg/ml