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CD81 antibody | 1D6

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SDS Safety Datasheet SDS
F 0.1 mg loader
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SDS Safety Datasheet SDS
F 25 µg loader
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Mouse anti Human CD81 antibody, clone 1D6 recognizes human CD81, a 26 kDa cell surface antigen also known as TAPA-1, and a member of the tetraspanin family. CD81 is widely expressed on human leucocytes and appears to be involved in a variety of cellular leucocytes including activation, proliferation and differentiation.

Mouse anti Human CD81 antibody, clone 1D6 is a potent CD81 reagent, induces homotypic adhesion and has powerful anti-proliferative effects.

Target Species
Species Cross-Reactivity
Target SpeciesCross Reactivity
N.B. Antibody reactivity and working conditions may vary between species.
Product Form
Purified IgG conjugated to Fluorescein Isothiocyanate Isomer 1 (FITC) - liquid
Purified IgG prepared by affinity chromatography on Protein A from tissue culture supernatant
Buffer Solution
Phosphate buffered saline
Preservative Stabilisers
0.09% sodium azide (NaN3)
1% bovine serum albumin
OCI-LY8 cells aggregated by 5A6 (another CD81 antibody)
Approx. Protein Concentrations
IgG concentration 0.1 mg/ml
Fusion Partners
Spleen cells from immunised BALB/c mice were fused with cells of the mouse PX3-Ag.8.653 myeloma cell line
Max Ex/Em
Fluorophore Excitation Max (nm) Emission Max (nm)
FITC 490 525
For research purposes only
12 months from date of despatch

This product is shipped at ambient temperature. It is recommended to aliquot and store at -20°C on receipt. When thawed, aliquot the sample as needed. Keep aliquots at 2-8°C for short term use (up to 4 weeks) and store the remaining aliquots at -20°C.

Avoid repeated freezing and thawing as this may denature the antibody. Storage in frost-free freezers is not recommended. This product is photosensitive and should be protected from light.

This product has been reported to work in the following applications. This information is derived from testing within our laboratories, peer-reviewed publications or personal communications from the originators. Please refer to references indicated for further information. For general protocol recommendations, please visit the antibody protocols page.
Application Name Verified Min Dilution Max Dilution
Flow Cytometry Neat
Where this product has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own system using appropriate negative/positive controls.
Flow Cytometry
Use 10μl of the suggested working dilution to label 106 cells in 100μl

How to Use the Spectraviewer

Watch the Tool Tutorial Video ▸
  • Start by selecting the application you are interested in, with the option to select an instrument from the drop down menu or create a customized instrument
  • Select the fluorophores or fluorescent proteins you want to include in your panel to check compatibility
  • Select the lasers and filters you wish to include
  • Select combined or multi-laser view to visualize the spectra

Description Product Code Applications Pack Size List Price Your Price Quantity
Mouse IgG1 Negative Control:FITC MCA928F F 100 Tests loader
List Price Your Price
Description Mouse IgG1 Negative Control:FITC

Description Product Code Applications Pack Size List Price Your Price Quantity
Human Seroblock BUF070A F 50 Test
List Price Your Price
Description Human Seroblock
Human Seroblock BUF070B F 200 Test
List Price Your Price
Description Human Seroblock

References for CD81 antibody

  1. Schick, M.R. & Levy, S. (1993) The TAPA-1 molecule is associated on the surface of B cells with HLA-DR molecules.
    J Immunol. 151 (8): 4090-7.
  2. Levy, S. et al. (1998) CD81 (TAPA-1): a molecule involved in signal transduction and cell adhesion in the immune system.
    Annu Rev Immunol. 16: 89-109.
  3. Flint, M. et al. (1999) Characterization of hepatitis C virus E2 glycoprotein interaction with a putative cellular receptor, CD81.
    J Virol. 73:6235-44.
  4. Davis, W.C. et al. (2007) Use of flow cytometry to identify monoclonal antibodies that recognize conserved epitopes on orthologous leukocyte differentiation antigens in goats, llamas, and rabbits.
    Vet Immunol Immunopathol. 119: 123-30.
  5. Griebel, P.J. et al. (2007) Cross-reactivity of mAbs to human CD antigens with sheep leukocytes.
    Vet Immunol Immunopathol. 119: 115-22.
  6. Rohlena, J. et al. (2009) Endothelial CD81 is a marker of early human atherosclerotic plaques and facilitates monocyte adhesion.
    Cardiovasc Res. 81: 187-96.
  7. Parthasarathy, V. et al. (2009) Distinct roles for tetraspanins CD9, CD63 and CD81 in the formation of multinucleated giant cells.
    Immunology. 127: 237-48.
  8. Welton, J.L. et al (2010) Proteomics analysis of bladder cancer exosomes.
    Mol Cell Proteomics. 9: 1324-38.
  9. View The Latest Product References
  10. Ventress, J.K. et al. (2016) Peptides from Tetraspanin CD9 Are Potent Inhibitors of Staphylococcus Aureus Adherence to Keratinocytes.
    PLoS One. 11 (7): e0160387.
  11. Mleczko, J. et al. (2018) Extracellular Vesicles from Hypoxic Adipocytes and Obese Subjects Reduce Insulin-Stimulated Glucose Uptake.
    Mol Nutr Food Res. 62 (5)Feb 20 [Epub ahead of print].

Flow Cytometry

Functional Assays

Entrez Gene
GO Terms
GO:0000187 activation of MAPK activity
GO:0005515 protein binding
GO:0008104 protein localization
GO:0005887 integral to plasma membrane
GO:0006661 phosphatidylinositol biosynthetic process
GO:0008283 cell proliferation
GO:0008284 positive regulation of cell proliferation
GO:0043128 positive regulation of 1-phosphatidylinositol 4-kinase activity
GO:0046813 virion attachment, binding of host cell surface receptor
GO:0050731 positive regulation of peptidyl-tyrosine phosphorylation
GO:0050776 regulation of immune response


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