• Product nameAnti-CD55 antibody [MEM-118]
    See all CD55 primary antibodies
  • Description
    Mouse monoclonal [MEM-118] to CD55
  • Tested applicationsSuitable for: IHC-P, Flow Cyt, IP, ICC/IFmore details
  • Species reactivity
    Reacts with: Human
    Predicted to work with: Non Human Primates
  • Immunogen

    Tissue/ cell preparation (Human). (T cell line HPB-ALL).


  • FormLiquid
  • Storage instructionsShipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C or -80°C. Avoid freeze / thaw cycle.
  • Storage bufferPreservative: 15mM Sodium Azide
    Constituents: PBS, pH 7.4
  • Concentration information loading...
  • Purity>95% by SDS-PAGE
  • Purification notesPurified from ascites by gel filtration and precipitation methods.
  • ClonalityMonoclonal
  • Clone numberMEM-118
  • IsotypeIgM
  • Research areas


Our Abpromise guarantee covers the use of ab1422 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
IHC-P Use a concentration of 10 µg/ml.
Flow Cyt Use 1µg for 106 cells.
IP Use at an assay dependent concentration.
ICC/IF Use at an assay dependent concentration. PubMed: 25254972


  • FunctionThis protein recognizes C4b and C3b fragments that condense with cell-surface hydroxyl or amino groups when nascent C4b and C3b are locally generated during C4 and c3 activation. Interaction of daf with cell-associated C4b and C3b polypeptides interferes with their ability to catalyze the conversion of C2 and factor B to enzymatically active C2a and Bb and thereby prevents the formation of C4b2a and C3bBb, the amplification convertases of the complement cascade.
  • Tissue specificityExpressed on the plasma membranes of all cell types that are in intimate contact with plasma complement proteins. It is also found on the surfaces of epithelial cells lining extracellular compartments, and variants of the molecule are present in body fluids and in extracellular matrix.
  • Sequence similaritiesBelongs to the receptors of complement activation (RCA) family.
    Contains 4 Sushi (CCP/SCR) domains.
  • DomainThe first Sushi domain (SCR1) is not necessary for function. SCR2 and SCR4 provide the proper conformation for the active site on SCR3.
  • Post-translational
    The Ser/Thr-rich domain is heavily O-glycosylated.
  • Cellular localizationCell membrane.
  • Information by UniProt
  • Database links
  • Alternative names
    • CD 55 antibody
    • CD55 antibody
    • CD55 antigen antibody
    • CD55 Cromer blood group system antibody
    • CD55 molecule antibody
    • CD55 molecule, decay accelerating factor for complement (Cromer blood group) antibody
    • Cd55a antibody
    • Complement decay accelerating factor antibody
    • Complement decay-accelerating factor antibody
    • Complement decay-accelerating factor, GPI-anchored antibody
    • CR antibody
    • CROM antibody
    • Cromer Blood Group antigen antibody
    • Cromer blood group system antibody
    • DAF antibody
    • Daf-GPI antibody
    • DAF_HUMAN antibody
    • Daf1 antibody
    • Dcay accelerating factor for complement (CD55, Cromer blood group system) antibody
    • Decay accelarating factor 1, isoform CRA_a antibody
    • Decay accelerating factor (GPI-form) antibody
    • Decay Accelerating Factor for Complement antibody
    • Decay accelerating factor GPI-form antibody
    • Decay accelerating factor soluble-form antibody
    • GPI-DAF antibody
    • TC antibody
    see all

Anti-CD55 antibody [MEM-118] images

  • Human peripheral blood lymphocytes stained with ab1422 (red line). Human whole blood was processed using a modified protocol based on Chow et al, 2005 (PMID: 16080188). In brief, human whole blood was fixed in 4% formaldehyde (methanol-free) for 10 min at 22°C. Red blood cells were then lyzed by the addition of Triton X-100 (final concentration - 0.1%) for 15 min at 37°C. For experimentation, cells were treated with 50% methanol (-20°C) for 15 min at 4°C. Cells were then incubated with the antibody (ab1422, 1μg/1x106 cells) for 30 min at 4°C. The secondary antibody used was DyLight® 488 goat anti-mouse IgM (mu chain) (ab97007) at 1/500 dilution for 30 min at 4°C. Isotype control antibody (black line) was mouse IgM [ICIGM] (ab91545, 1μg/1x106 cells) used under the same conditions. Unlabelled sample (blue line) was also used as a control. Acquisition of >30,000 total events were collected using a 20mW Argon ion laser (488nm) and 525/30 bandpass filter. Gating strategy - peripheral blood lymphocytes.

References for Anti-CD55 antibody [MEM-118] (ab1422)

This product has been referenced in:
  • Lee MS  et al. Exploitation of the complement system by oncogenic Kaposi's sarcoma-associated herpesvirus for cell survival and persistent infection. PLoS Pathog 10:e1004412 (2014). ICC/IF ; Human . Read more (PubMed: 25254972) »
  • Cinek T & Horejsi­ V The nature of large noncovalent complexes containing glycosyl-phosphatidylinositol-anchored membrane glycoproteins and protein tyrosine kinases. J Immunol 149:2262-70 (1992). Read more (PubMed: 1382093) »

See all 2 Publications for this product

Product Wall

Abcam guarantees this product to work in the species/application used in this Abreview.
Application Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections)
Sample Human Tissue sections (intestine)
Specification intestine
Fixative Paraformaldehyde
Antigen retrieval step None
Permeabilization No

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Verified customer

Submitted May 02 2012

Thank you for contacting Abcam yesterday.

I asked the supplying lab for the IHC-P protocol they used to verify that the antibody works in IHC but they we do not have the protocol, only information that the suitable working concentration for I...

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