• Product nameAnti-CD8 antibody [MEM-31] (Biotin)
    See all CD8 primary antibodies
  • Description
    Mouse monoclonal [MEM-31] to CD8 (Biotin)
  • ConjugationBiotin
  • Specificityab28090 recognizes CD8 antigen.
  • Tested applicationsSuitable for: Flow Cytmore details
    Unsuitable for: WB
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Tissue/ cell preparation (Human) Crude thymus membrane fraction

  • Epitopeab28090 recognizes a conformationally dependent epitope of CD8 antigen (does not react with formaldehyde-fixed cells)
  • General notes

    The purified antibody is conjugated with Biotin-LC-NHS.



Our Abpromise guarantee covers the use of ab28090 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 1µg for 106 cells. ab18454-Mouse monoclonal IgG2a, is suitable for use as an isotype control with this antibody.
  • Application notesIs unsuitable for WB.
  • Target

    • FunctionIdentifies cytotoxic/suppressor T-cells that interact with MHC class I bearing targets. CD8 is thought to play a role in the process of T-cell mediated killing. CD8 alpha chains binds to class I MHC molecules alpha-3 domains.
    • Involvement in diseaseDefects in CD8A are a cause of familial CD8 deficiency (CD8 deficiency) [MIM:608957]. Familial CD8 deficiency is a novel autosomal recessive immunologic defect characterized by absence of CD8+ cells, leading to recurrent bacterial infections.
    • Sequence similaritiesContains 1 Ig-like V-type (immunoglobulin-like) domain.
    • Post-translational
      All of the five most C-terminal cysteines form inter-chain disulfide bonds in dimers and higher multimers, while the four N-terminal cysteines do not.
    • Cellular localizationSecreted and Cell membrane.
    • Information by UniProt
    • Database links
    • FormCD8 beta tissue specificity: Isoform 1, isoform 3, isoform 5, isoform 6, isoform 7 and isoform 8 are expressed in both thymus and peripheral CD8+ T-cells. Expression of isoform 1 is higher in thymus CD8+ T-cells than in peripheral CD8+ T-cells. Expression of isoform 6 is higher in peripheral CD8+ T-cells than in thymus CD8+ T-cells. CD8 beta PTM: Phosphorylated as a consequence of T-cell activation.
    • Alternative names
      • CD8 antibody
      • CD8 antigen, alpha polypeptide (p32) antibody
      • CD8a antibody
      • CD8a antigen antibody
      • CD8a molecule antibody
      • CD8A_HUMAN antibody
      • Leu2 antibody
      • Leu2 T lymphocyte antigen antibody
      • MAL antibody
      • OKT8 T cell antigen antibody
      • p32 antibody
      • T cell antigen Leu2 antibody
      • T cell co receptor antibody
      • T-cell surface glycoprotein CD8 alpha chain antibody
      • T-lymphocyte differentiation antigen T8/Leu-2 antibody
      • T8 T cell antigen antibody
      see all

    Anti-CD8 antibody [MEM-31] (Biotin) images

    • Overlay histogram showing peripheral blood lymphocytes stained with ab28090 (red line). The cells were incubated with the antibody (ab28090, 1µg/1x106 cells) followed by Streptavidin-FITC conjugated protein for 30 min at 4ºC. Isotype control antibody (black line) was mouse IgG2a [ICIGG2A] (ab91361, 1µg/1x106 cells) with secondary antibody DyLight® 488 goat anti-mouse IgG (H+L) (ab96879) at 1/500 dilution used under the same conditions. Acquisition of >5,000 events was performed gating on peripheral blood lymphocytes.

    References for Anti-CD8 antibody [MEM-31] (Biotin) (ab28090)

    This product has been referenced in:
    • Horejsí V  et al. Monoclonal antibodies against human leucocyte antigens. I. Antibodies against beta-2-microglobulin, immunoglobulin kappa light chains, HLA-DR-like antigens, T8 antigen, T1 antigen, a monocyte antigen, and a pan-leucocyte antigen. Folia Biol (Praha) 32:12-25 (1986). Read more (PubMed: 2422063) »

    See 1 Publication for this product

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