Anti-CD81 antibody [M38]
- BOND RX™ Validated
- KO Validated
- What is this?
4
(2 Reviews)
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(223 Publications)
Anti-CD81 antibody [M38] (ab79559) is a mouse monoclonal antibody detecting CD81 in Western Blot, Flow Cytometry, IHC-P. Suitable for Human.
- KO validated for confirmed specificity
- Over 140 publications
- Trusted since 2009
View Alternative Names
CD81, TAPA1, TSPAN28, CD81 antigen, 26 kDa cell surface protein TAPA-1, Target of the antiproliferative antibody 1, Tetraspanin-28, Tspan-28
- IHC-P
Lab
Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-CD81 antibody [M38] (AB79559)
IHC image of CD81 staining in Human normal liver formalin fixed paraffin embedded tissue section, performed on a Leica Bond™ system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab79559, 5 μg/mL, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.
For other IHC staining systems (automated and non-automated) customers should optimize variable parameters such as antigen retrieval conditions, primary antibody concentration and antibody incubation times.
- Flow Cyt
Supplier Data
Flow Cytometry - Anti-CD81 antibody [M38] (AB79559)
Flow cytometry analysis using human peripheral blood cells with ab79559 at 4 μg/ml.
- Flow Cyt
Supplier Data
Flow Cytometry - Anti-CD81 antibody [M38] (AB79559)
Separation of human lymphocytes (red-filled) from neutrophil granulocytes (black-dashed) in flow cytometry analysis of human peripheral whole blood stained using ab79559 at 4 μg/ml.
- Flow Cyt
Lab
Flow Cytometry - Anti-CD81 antibody [M38] (AB79559)
Flow cytometry overlay histogram showing left Jurkat positive cells and right negative HepG2 stained with ab79559 (red line). The cells were incubated in 1x PBS containing 10% normal goat serum to block non-specific protein-protein interactionfollowed by the antibody (ab79559) (1x 106 in 100μl at 0.2 μg/ml (1/5000)) for 30min on ice.
The secondary antibody Goat Anti-Mouse IgG H&L (Alexa Fluor® 488) preadsorbed was incubated at 1/4000 for 30min on ice
Isotype control antibody (black line) was Mouse IgG1, kappa monoclonal [15-6E10A7] - Isotype Control used at the same concentration and conditions as the primary antibody. Unlabelled sample (blue line) was also used as a control.
Acquisition of >5000 events were collected using a 50 mW Blue laser (488nm) and 525/40 bandpass filter.
- Flow Cyt
Lab
Flow Cytometry - Anti-CD81 antibody [M38] (AB79559)
Flow cytometry overlay histogram showing wild-type HAP1 (green line) and CD81 knockout HAP1 stained with ab79559 (magenta line). The cells were incubated in 1x PBS containing 10% normal goat serum to block non-specific protein-protein interaction followed by the antibody (ab79559) (1x 106 in 100μl at 0.2 μg/ml (1/5000)) for 30min on ice.
The secondary antibody Goat Anti-Mouse IgG H&L (Alexa Fluor® 488) preadsorbed was incubated at 1/4000 for 30min on ice
Isotype control antibody Mouse IgG1, kappa monoclonal [15-6E10A7] - Isotype Control was used at the same concentration and conditions as the primary antibody (wild-type HAP1 - black line, CD81 knockout HAP1 - grey line). Unlabelled sample was also used as a control (this line is not shown for the purpose of simplicity).
Acquisition of >5000 events were collected using a 50 mW Blue laser (488nm) and 525/40 bandpass filter.
- WB
Supplier Data
Western blot - Anti-CD81 antibody [M38] (AB79559)
All lanes:
Western blot - Anti-CD81 antibody [M38] (ab79559) at 2 µg/mL
All lanes:
Jurkat (human T cell leukemia cell line from peripheral blood) whole cell lysate
Secondary
All lanes:
IRDye800-conjugated Anti-Mouse Secondary Antibody
Predicted band size: 25 kDa
Observed band size: 25 kDa
false
Reactivity data
Product details
Anti-CD81 antibody [M38] (ab79559) is a mouse monoclonal antibody and is validated for use in Flow Cyt, IHC-P, WB in human samples.
Anti-CD81 antibody [M38] (ab79559) specifically detects CD81 (UniProt ID: P60033; Molecular weight: 26kDa) and is sold in 100 µg selling sizes.
Quality and Validation
Abcam's high quality validation processes ensure Anti-CD81 antibody [M38] (ab79559) has high sensitivity and specificity.
The specificity of Anti-CD81 antibody [M38] (ab79559) has been confirmed by testing in knockout samples.
Anti-CD81 antibody [M38] (ab79559) has been cited over 142 times in peer reviewed journals and is trusted by the scientific community.
Related Products
Antibody clone M38 is also available pre-conjugated to a variety of labels for your convenience - APC/Cy7®, APC, Biotin, FITC, HRP (ab200565, ab233259, ab239238, ab239256).
Target Information
CD81 or TAPA1 is a tetraspanin protein that plays a significant role in oncology, particularly in the context of cancer cell proliferation and metastasis. CD81 or TAPA1 is highly expressed in several types of cancer cells and it is involved in various cellular processes, including cell adhesion, migration, and signal transduction. CD81 also contributes to the tumor microenvironment by facilitating interactions between cancer cells and their surroundings.
Properties and storage information
Form
Purification technique
Purification notes
Storage buffer
Shipped at conditions
Appropriate short-term storage conditions
Appropriate long-term storage conditions
Aliquoting information
Storage information
Supplementary information
This supplementary information is collated from multiple sources and compiled automatically.
Biological function summary
CD81 interacts with other tetraspanins and forms complexes within the membrane to regulate cellular signaling trafficking and adhesion. It participates in the assembly of larger tetraspanin-enriched microdomains which are important for efficient signaling and functional variety. These complexes modulate cell morphology proliferation and development influencing immune responses and pathogen entry to cells. The presence of CD81 in diverse tissues implies its involvement in a wide range of cellular processes forming essential complexes with proteins like integrins that further engage in tissue repair and immunological defense.
Pathways
CD81 plays significant roles in the immune system and viral entry pathways. It interacts with other proteins like CD9 and CD19 within the immune response pathways regulating lymphocyte activation and differentiation. CD81 is notably a coreceptor in the hepatitis C virus (HCV) entry pathway facilitating viral attachment and fusion into host cells. These interactions illustrate CD81's involvement in modulation of immune cell responses and influence on pathogen infection processes integrating into the complex cellular pathways important for maintaining homeostasis and response to external stimuli.
Product protocols
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Target data
Publications (223)
Recent publications for all applications. Explore the full list and refine your search
Nature neuroscience 28:2201-2216 PubMed41044342
2025
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Bioengineering & translational medicine 10:e70025 PubMed41030280
2025
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Nature communications 16:6960 PubMed40730843
2025
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Human cell 38:124 PubMed40614007
2025
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Journal of extracellular vesicles 14:e70088 PubMed40511723
2025
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Stem cells international 2025:5091529 PubMed40476182
2025
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Scientific reports 15:19383 PubMed40461530
2025
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Cell stress & chaperones 30:100081 PubMed40345640
2025
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Cancer immunology, immunotherapy : CII 74:193 PubMed40343498
2025
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Cell death discovery 11:198 PubMed40280913
2025
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Product promise
Please note: All products are 'FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC OR THERAPEUTIC PROCEDURES'.
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