• Product nameAnti-Fc epsilon RI antibody [CRA1] (Biotin)
    See all Fc epsilon RI primary antibodies
  • Description
    Mouse monoclonal [CRA1] to Fc epsilon RI (Biotin)
  • ConjugationBiotin
  • Specificityab122882 reacts with the Fc epsilon RI subunit on a region that does not overlap the region of the IgE binding site, thus it does not compete with IgE for the receptor binding. Since clone CRA2 (ab122891; ab122915) reacts with the IgE binding site on Fc epsilon RI, it competes with IgE for the receptor binding. Combining the two antibodies, one can quantitatively measure the amounts of the IgE-bound Fc epsilon RI.
  • Tested applicationsSuitable for: WB, Flow Cyt, ICC/IFmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Recombinant fragment:


    , corresponding to amino acids 1-84 of Human Fc epsilon RI

  • Epitopecorresponds to Amino acids 1-84 of Human Fc epsilon RI
  • Positive control
    • CHO/alpha beta gamma cells
  • General notes

    [biotin]/[IgG] = 8.9


  • FormLiquid
  • Storage instructionsShipped at 4°C. Store at +4°C short term (1-2 weeks). Store at -20°C or -80°C. Avoid freeze / thaw cycle.
  • Storage bufferpH: 7.40
    Constituents: 49% PBS, 50% Glycerol
  • Concentration information loading...
  • PurityIgG fraction
  • Purification notesThe IgG fraction was purified from serum free culture medium of mouse hybridoma (CRA1) by propriety chromatography under mild conditions. Filter sterilized.
  • ClonalityMonoclonal
  • Clone numberCRA1
  • IsotypeIgG2b
  • Light chain typekappa
  • Research areas


Our Abpromise guarantee covers the use of ab122882 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. Predicted molecular weight: 29 kDa.
Flow Cyt Use at an assay dependent concentration. ab18418-Mouse monoclonal IgG2b, is suitable for use as an isotype control with this antibody.
ICC/IF Use at an assay dependent concentration.


  • FunctionBinds to the Fc region of immunoglobulins epsilon. High affinity receptor. Responsible for initiating the allergic response. Binding of allergen to receptor-bound IgE leads to cell activation and the release of mediators (such as histamine) responsible for the manifestations of allergy. The same receptor also induces the secretion of important lymphokines.
  • Sequence similaritiesContains 2 Ig-like (immunoglobulin-like) domains.
  • Cellular localizationCell membrane.
  • Information by UniProt
  • Database links
  • Alternative names
    • Fc epsilon RI alpha antibody
    • Fc epsilon RI alpha chain antibody
    • Fc epsilon RI alpha-chain antibody
    • Fc fragment of IgE high affinity I receptor for alpha polypeptide antibody
    • Fc fragment of IgE, high affinity I, receptor for, alpha subunit antibody
    • Fc fragment of IgE, high affinity I, receptor for; alpha polypeptide antibody
    • Fc IgE receptor alpha polypeptide antibody
    • Fc IgE receptor, alpha chain antibody
    • Fc IgE receptor, alpha polypeptide antibody
    • Fc of IgE high affinity I receptor for alpha polypeptide antibody
    • Fc-epsilon RI-alpha antibody
    • FCE 1A antibody
    • FCE1A antibody
    • FCER 1A antibody
    • Fcer1a antibody
    • FCERA_HUMAN antibody
    • FceRI alpha antibody
    • FcERI antibody
    • high affinity IgE receptor antibody
    • High affinity immunoglobulin epsilon receptor alpha subunit antibody
    • high affinity immunoglobulin epsilon receptor alpha-subunit antibody
    • High affinity immunoglobulin epsilon receptor subunit alpha antibody
    • IgE Fc receptor alpha subunit antibody
    • IgE Fc receptor subunit alpha antibody
    • Immunoglobulin E receptor high affinity of mast cells alpha polypeptide antibody
    • immunoglobulin E receptor, high-affinity, of mast cells, alpha polypeptide antibody
    see all

Anti-Fc epsilon RI antibody [CRA1] (Biotin) images

  • FACS analysis of CHO/alpha beta gamma cells (1x105) with CRA1 and CRA2 antibodies by indirect-immunostaining, using FITC-labeled secondary antibody.

References for Anti-Fc epsilon RI antibody [CRA1] (Biotin) (ab122882)

This product has been referenced in:
  • Untersmayr E  et al. The high affinity IgE receptor Fc epsilonRI is expressed by human intestinal epithelial cells. PLoS One 5:e9023 (2010). Read more (PubMed: 20126404) »
  • Takai T  et al. Direct expression of the extracellular portion of human FcepsilonRIalpha chain as inclusion bodies in Escherichia coli. Biosci Biotechnol Biochem 65:79-85 (2001). Read more (PubMed: 11272849) »

See all 4 Publications for this product

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