CD81 antibody | Eat2

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Hamster anti Mouse CD81:Alexa Fluor® 488

Hamster anti Mouse CD81:Alexa Fluor® 647

Hamster anti Mouse CD81:FITC

Hamster anti Mouse CD81

Hamster anti Mouse CD81:RPE

Product Type
Monoclonal Antibody
Clone
Eat2
Isotype
IgG1
Product CodeApplicationsDatasheetMSDSPack SizeList PriceQuantity
MCA1846A488T F 25 Tests/0.25ml
MCA1846A488 F 100 Tests/1ml
MCA1846A647 F 100 Tests/1ml
MCA1846A647T F 25 Tests/0.25ml
MCA1846F F 0.1 mg
MCA1846 C* E F IP WB* 0.25 mg
MCA1846GA C* E F IP WB* 0.1 mg
MCA1846T C* E F IP WB* 25 µg
MCA1846PE F 100 Tests
MCA1846PET F 25 Tests
Hamster anti Mouse CD81 antibody, clone Eat2 recognizes mouse and rat CD81, also known as TAPA-1 or Target of the antiproliferative antibody 1. CD81 is a 236 amino acid ~26 kDa multipass transmembrane protein belonging to the TM4SF family (UniProt: P35762). In rodents CD81 is expressed at much higher levels on resting B cells than on T cells, although increased expression on T cells is found following activation. Hamster anti Mouse CD81 antibody, clone Eat2 induces homotypic aggregation of B cells and inhibits anti Ig and IL-4 induced proliferation (Maecker et al. 2000). Eat 2 requires the presence of both extracellular loops of TAPA-1 for binding.

Mice lacking CD81 demonstrate reduced fertility through impaired oocyte-sperm fusion, double knockout CD81-/- CD9-/- mice are completely infertile suggesting complimentary roles in oocyte-sperm fusion (Rubenstein et al. 2006).

Product Details

Target Species
Mouse
Species Cross-Reactivity
Target SpeciesCross Reactivity
Rat
N.B. Antibody reactivity and working conditions may vary between species.
Product Form
Purified IgG conjugated to Alexa Fluor® 488 - liquid
Product Form
Purified IgG conjugated to Alexa Fluor® 647 - liquid
Product Form
Purified IgG conjugated to Fluorescein Isothiocyanate Isomer 1 (FITC) - liquid
Product Form
Purified IgG - liquid
Product Form
Purified IgG conjugated to R. Phycoerythrin (RPE) - lyophilized
Reconstitution
Pack Size: 100 Tests
Reconstitute with 1.0 ml distilled water
Pack Size: 25 Tests
Reconstitute in 0.25 ml disilled water
Preparation
Purified IgG prepared by affinity chromatography on Protein G from tissue culture supernatant
Preparation
Purified IgG prepared by affinity chromatography on Protein G from tissue culture supernatant
Preparation
Purified IgG prepared by affinity chromatography on Protein G from tissue culture supernatant
Preparation
Purified IgG prepared by affinity chromatography on Protein G from tissue culture supernatant
Preparation
Purified IgG prepared by affinity chromatography on Protein G from tissue culture supernatant
Buffer Solution
Phosphate buffered saline
Buffer Solution
Phosphate buffered saline
Buffer Solution
Phosphate buffered saline
Buffer Solution
Phosphate buffered saline
Buffer Solution
Phosphate buffered saline
Preservative Stabilisers
0.09%Sodium Azide
1%Bovine Serum Albumin
Preservative Stabilisers
0.09%Sodium Azide
1%Bovine Serum Albumin
Preservative Stabilisers
0.09%Sodium Azide
1%Bovine Serum Albumin
Preservative Stabilisers
0.09%Sodium Azide
Preservative Stabilisers
0.09%Sodium Azide
1%Bovine Serum Albumin
5%Sucrose
Carrier Free
Yes
Immunogen
38C13, murine B cell line.
Approx. Protein Concentrations
IgG concentration 0.05 mg/ml
Approx. Protein Concentrations
IgG concentration 0.05 mg/ml
Approx. Protein Concentrations
IgG concentration 0.1 mg/ml
Approx. Protein Concentrations
Pack Size: 0.25 mg, 25 µg
IgG concentration 1.0 mg/ml
Pack Size: 0.1 mg
IgG concentration 1 mg/ml
Fusion Partners
Spleen cells from immunised Armenian hamsters were fused with cells of the mouse PX3-Ag.8.653 myeloma cell line.

Storage Information

Storage
Store at +4oC or at -20oC if preferred.

This product should be stored undiluted.

Storage in frost free freezers is not recommended. This product is photosensitive and should be protected from light.

Avoid repeated freezing and thawing as this may denature the antibody. Should this product contain a precipitate we recommend microcentrifugation before use.
Storage
Store at +4oC or at -20oC if preferred.

This product should be stored undiluted.

Storage in frost free freezers is not recommended. This product is photosensitive and should be protected from light.

Avoid repeated freezing and thawing as this may denature the antibody. Should this product contain a precipitate we recommend microcentrifugation before use.
Storage
Store at +4oC or at -20oC if preferred.

This product should be stored undiluted.

Storage in frost free freezers is not recommended. This product is photosensitive and should be protected from light.

Avoid repeated freezing and thawing as this may denature the antibody. Should this product contain a precipitate we recommend microcentrifugation before use.
Storage
Pack Size: 0.25 mg, 25 µg
Store at +4oC or at -20oC if preferred.

This product should be stored undiluted.

Storage in frost-free freezers is not recommended. Avoid repeated freezing and thawing as this may denature the antibody. Should this product contain a precipitate we recommend microcentrifugation before use.
Pack Size: 0.1 mg
Store at +4oC or at -20oC if preferred.

This product should be stored undiluted.

Storage in frost free freezers is not recommended. Avoid repeated freezing and thawing as this may denature the antibody. Should this product contain a precipitate we recommend microcentrifugation before use.
Storage
Store at +4oC.

DO NOT FREEZE.

This product should be stored undiluted. This product is photosensitive and should be protected from light. Should this product contain a precipitate we recommend microcentrifugation before use.
Shelf Life
18 months from date of despatch.
Shelf Life
18 months from date of despatch.
Shelf Life
18 months from date of despatch.
Shelf Life
18 months from date of despatch.
Shelf Life
12 months from date of reconstitution.

More Information

UniProt
P35762 Related reagents
Entrez Gene
Cd81 Related reagents
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:0030307 positive regulation of cell growth
GO:0030890 positive regulation of B cell proliferation
GO:0043128 positive regulation of 1-phosphatidylinositol 4-kinase activity
GO:0050731 positive regulation of peptidyl-tyrosine phosphorylation
Acknowledgements
This product is provided under an intellectual property licence from Life Technologies Corporation. The transfer of this product is contingent on the buyer using the purchase product solely in research, excluding contract research or any fee for service research, and the buyer must not sell or otherwise transfer this product or its components for (a) diagnostic, therapeutic or prophylactic purposes; (b) testing, analysis or screening services, or information in return for compensation on a per-test basis; (c) manufacturing or quality assurance or quality control, or (d) resale, whether or not resold for use in research. For information on purchasing a license to this product for purposes other than as described above, contact Life Technologies Corporation, 5791 Van Allen Way, Carlsbad CA 92008 USA or outlicensing@thermofisher.com
Acknowledgements
This product is provided under an intellectual property licence from Life Technologies Corporation. The transfer of this product is contingent on the buyer using the purchase product solely in research, excluding contract research or any fee for service research, and the buyer must not sell or otherwise transfer this product or its components for (a) diagnostic, therapeutic or prophylactic purposes; (b) testing, analysis or screening services, or information in return for compensation on a per-test basis; (c) manufacturing or quality assurance or quality control, or (d) resale, whether or not resold for use in research. For information on purchasing a license to this product for purposes other than as described above, contact Life Technologies Corporation, 5791 Van Allen Way, Carlsbad CA 92008 USA or outlicensing@thermofisher.com
Regulatory
For research purposes only

Applications of CD81 antibody

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 Neat Pack Size: 25 Tests/0.25ml
1/2 Pack Size: 100 Tests/1ml
Flow Cytometry Neat
Flow Cytometry
ELISA
Flow Cytometry 1/50 Pack Size: 0.25 mg, 25 µg
1/10 Pack Size: 0.1 mg
1/100 Pack Size: 0.25 mg, 25 µg
1/50 Pack Size: 0.1 mg
Immunohistology - Frozen 1
Immunohistology - Paraffin
Immunoprecipitation
Western Blotting 2
Flow Cytometry Neat
  1. 1The epitope recognised by this antibody is reported to be sensitive to formaldehyde fixation and tissue processing. Bio-Rad recommends the use of acetone fixation for frozen sections.
  2. 2Clone Eat2 recognizes mouse CD81 under non-reducing conditions.
Where this antibody has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. It is recommended that the user titrates the antibody for use in their own system using appropriate negative/positive controls.
Where this antibody has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. It is recommended that the user titrates the antibody for use in their own system using appropriate negative/positive controls.
Where this antibody has not been tested for use in a particular technique this does not necessarily exclude its use in such procedures. It is recommended that the user titrates the antibody for use in their own system using appropriate negative/positive controls.
Where this antibody 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 antibody for use in their own system using appropriate negative/positive controls.
Where this antibody 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 antibody for use in their own system using appropriate negative/positive controls.
Flow Cytometry
Use 10ul of the suggested working dilution to label 106 cells in 100ul.

The Fc region of monoclonal antibodies may bind non-specifically to cells expressing low affinity Fc receptors. This may be reduced by using SeroBlock FcR (
Flow Cytometry
Use 10ul of the suggested working dilution to label 106 cells in 100ul.

The Fc region of monoclonal antibodies may bind non-specifically to cells expressing low affinity Fc receptors. This may be reduced by using SeroBlock FcR (BUF041A/B/C).
Flow Cytometry
Use 10ul of the suggested working dilution to label 106 cells in 100ul.

The Fc region of monoclonal antibodies may bind non-specifically to cells expressing low affinity Fc receptors. This may be reduced by using SeroBlock FcR ( BUF041A/B).
Flow Cytometry
Use 10ul of the suggested working dilution to label 106 cells in 100ul.
Flow Cytometry
Use 10ul of the suggested working dilution to label 106 cells in 100ul.

The Fc region of monoclonal antibodies may bind non-specifically to cells expressing low affinity Fc receptors. This may be reduced by using SeroBlock FcR (BUF041A/B).

Secondary Antibodies Available

Description Product Code Pack Size Applications List Price Quantity
Goat F(ab')2 anti Hamster IgG:DyLight®549 STAR104D549GA 0.1 mg F IF
Goat F(ab')2 anti Hamster IgG:DyLight®649 STAR104D649GA 0.1 mg F IF
Goat F(ab')2 anti Hamster IgG:Dylight®800 STAR104D800GA 0.1 mg F IF WB
Goat F(ab')2 anti Hamster IgG:FITC STAR104F 0.4 mg F
Goat anti Hamster IgG:Biotin STAR79B 0.8 mg E F
Goat anti Hamster IgG:FITC STAR79F 0.7 mg F
Goat anti Hamster IgG:HRP STAR79P 0.8 mg E

Useful Reagents Available

Description Product Code Pack Size Applications List Price Quantity
Mouse Seroblock FcR BUF041A 0.1 mg F
Mouse Seroblock FcR BUF041B 0.5 mg F
Mouse Seroblock FcR BUF041A 0.1 mg F
Mouse Seroblock FcR BUF041B 0.5 mg F
Mouse Seroblock FcR BUF041A 0.1 mg F
Mouse Seroblock FcR BUF041B 0.5 mg F
Mouse Seroblock FcR BUF041A 0.1 mg F
Mouse Seroblock FcR BUF041B 0.5 mg F

Application Based External Images

Western Blotting

Product Specific References

References for CD81 antibody

  1. Clark, K.L. et al. (2001) PGRL is a major CD81-associated protein on lymphocytes and distinguishes a new family of cell surface proteins.
    J Immunol. 167 (9): 5115-21.
  2. Maecker, H.T. et al. (2000) Differential expression of murine CD81 highlighted by new anti-mouse CD81 monoclonal antibodies.
    Hybridoma 19: 15-22.
  3. Conde-Vancells, J. et al. (2010) Candidate biomarkers in exosome-like vesicles purified from rat and mouse urine samples.
    Proteomics Clin Appl. 4 (4): 416-25.
  4. Conde-Vancells, J. et al. (2008) Characterization and comprehensive proteome profiling of exosomes secreted by hepatocytes.
    J Proteome Res. 7: 5157-66.
  5. Takeda, Y. et al. (2008) Double deficiency of tetraspanins CD9 and CD81 alters cell motility and protease production of macrophages and causes chronic obstructive pulmonary disease-like phenotype in mice.
    J Biol Chem. 283: 26089-97.
  6. Suzuki, M. et al. (2009) Tetraspanin CD9 negatively regulates lipopolysaccharide-induced macrophage activation and lung inflammation.
    J Immunol. 182: 6485-93.
  7. Ha, C.T. et al. (2005) Binding of pregnancy-specific glycoprotein 17 to CD9 on macrophages induces secretion of IL-10, IL-6, PGE2, and TGF-beta1.
    J Leukoc Biol. 77: 948-57.
  8. Pan, Q. et al. (2011) Hepatic cell-to-cell transmission of small silencing RNA can extend the therapeutic reach of RNA interference (RNAi).
    Gut. 61: 1330-9.
  9. Jin, Y. et al. (2013) Statins decrease lung inflammation in mice by upregulating tetraspanin CD9 in macrophages.
    PLoS One. 8: e73706.
  10. Royo, F. et al. (2013) Transcriptome of extracellular vesicles released by hepatocytes.
    PLoS One. 8: e68693.
  11. Owens, D.M. and Watt, F.M. (2001) Influence of beta1 integrins on epidermal squamous cell carcinoma formation in a transgenic mouse model: alpha3beta1, but not alpha2beta1, suppresses malignant conversion.
    Cancer Res. 61: 5248-54.
  12. Jin, Y. et al. (2018) Double deletion of tetraspanins CD9 and CD81 in mice leads to a syndrome resembling accelerated aging.
    Sci Rep. 8 (1): 5145.