• Product name
    Anti-CD81 antibody [Eat 2] (Phycoerythrin)
    See all CD81 primary antibodies
  • Description
    Armenian hamster monoclonal [Eat 2] to CD81 (Phycoerythrin)
  • Host species
    Armenian hamster
  • Conjugation
    Phycoerythrin. Ex: 488nm, Em: 575nm
  • Specificity
    ab23553 recognises CD81, a 26kD cell surface glycoprotein that is also known as TAPA-1.
  • Tested applications
    Suitable for: Flow Cytmore details
  • Species reactivity
    Reacts with: Mouse, Rat
  • Immunogen

    Tissue, cells or virus corresponding to Mouse CD81. Tissue/ cell preparation: 38C13, murine B cell line.

  • General notes
    Myeloma: Spleen cells from immunised Armenian hamsters were fused with cells of the mouse PX3-Ag.8.653 myeloma cell line.

    Purified IgG conjugated to R. Phycoerythrin (RPE).



Our Abpromise guarantee covers the use of ab23553 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
  • Application notes
    Flow Cyt: 1/neat.
    Use 10µl for 106 cells in 100µl.

    Note: ab23553 induces homotypic aggregation of B cells and inhibits anti Ig and IL4 induced proliferation. ab23553 requires the presence of both extracellular loops of TAPA1 for binding.

    Not tested in other applications.
    Optimal dilutions/concentrations should be determined by the end user.
  • Target

    • Function
      May play an important role in the regulation of lymphoma cell growth. Interacts with a 16-kDa Leu-13 protein to form a complex possibly involved in signal transduction. May acts a the viral receptor for HCV.
    • Tissue specificity
      Hematolymphoid, neuroectodermal and mesenchymal tumor cell lines.
    • Involvement in disease
      Defects in CD81 are the cause of immunodeficiency common variable type 6 (CVID6) [MIM:613496]; also called antibody deficiency due to CD81 defect. CVID6 is a primary immunodeficiency characterized by antibody deficiency, hypogammaglobulinemia, recurrent bacterial infections and an inability to mount an antibody response to antigen. The defect results from a failure of B-cell differentiation and impaired secretion of immunoglobulins; the numbers of circulating B cells is usually in the normal range, but can be low.
    • Sequence similarities
      Belongs to the tetraspanin (TM4SF) family.
    • Post-translational
      Not glycosylated.
    • Cellular localization
    • Information by UniProt
    • Database links
    • Alternative names
      • 26 kDa cell surface protein TAPA 1 antibody
      • 26 kDa cell surface protein TAPA-1 antibody
      • 26 kDa cell surface protein TAPA1 antibody
      • CD 81 antibody
      • CD81 antibody
      • CD81 antigen (target of antiproliferative antibody 1) antibody
      • CD81 antigen antibody
      • CD81 molecule antibody
      • CD81_HUMAN antibody
      • CVID6 antibody
      • S5.7 antibody
      • TAPA 1 antibody
      • TAPA1 antibody
      • Target of the antiproliferative antibody 1 antibody
      • Tetraspanin 28 antibody
      • Tetraspanin-28 antibody
      • Tetraspanin28 antibody
      • Tspan 28 antibody
      • Tspan-28 antibody
      • Tspan28 antibody
      see all


    ab23553 has not yet been referenced specifically in any publications.

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