Anti-CD81 antibody [TS81] - BSA and Azide free
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(30 Publications)
Mouse Monoclonal CD81 antibody. Carrier free. Suitable for IHC-P, Flow Cyt, WB, ICC/IF and reacts with Human samples. Cited in 30 publications. Immunogen corresponding to Cell preparation containing CD81 protein.
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
- Flow Cyt
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Flow Cytometry - Anti-CD81 antibody [TS81] - BSA and Azide free (AB59477)
Overlay histogram showing Jurkat cells stained with ab59477 (red line). The cells were fixed with 4% paraformaldehyde (10 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab59477, 0.5μg/1x106 cells) for 30 min at 22°C. The secondary antibody used was DyLight® 488 goat anti-mouse IgG (H+L) (ab96879) at 1/500 dilution for 30 min at 22°C. Isotype control antibody (black line) was mouse IgG2a [ICIGG2A] (ab91361, 1μg/1x106 cells) used under the same conditions. Acquisition of >5,000 events was performed. This antibody gave a positive signal in Jurkat cells fixed with 80% methanol (5 min)/permeabilized with 0.1% PBS-Tween for 20 min used under the same conditions.
- Flow Cyt
Lab
Flow Cytometry - Anti-CD81 antibody [TS81] - BSA and Azide free (AB59477)
Overlay histogram showing HAP1 wildtype (green line) and HAP1-CD81 knockout cells (red line) stained with ab59477. The cells were fixed with 4% formaldehyde (10 min) and then permeabilized with 0.1% PBS-Triton X-100 for 15 min. The cells were then incubated in 1x PBS / 10% normal goat serum to block non-specific protein-protein interactions followed by the antibody (ab59477, 1μg/ml) for 30 min at 22°C. The secondary antibody used was Alexa Fluor® 488 goat anti-mouse IgG (H&L) presorbed (ab150117) at 1/2000 dilution for 30 min at 22°C.
A mouse IgG1 isotype control antibody (ab170190) was used at the same concentration and conditions as the primary antibody (HAP1 wildtype - black line, HAP1-CD81 knockout - grey line). Unlabelled sample was also used as a control (this line is not shown for the purpose of simplicity).
Acquisition of >5,000 events were collected using a 50 mW Blue laser (488nm) and 530/30 bandpass filter.
This antibody can also be used in HAP1 cells fixed with 80% methanol (5 min), , permeabilized with 0.1% PBS-Triton X-100 for 15 min under the same conditions.
- WB
CiteAb
Western blot - Anti-CD81 antibody [TS81] - BSA and Azide free (AB59477)
CD81 western blot using anti-CD81 antibody [TS81] - BSA and Azide free ab59477. Publication image and figure legend from Liu, X., Wang, S., et al., 2018, Stem Cell Res Ther, PubMed 29895333.
ab59477 was used in this publication in western blot. This may not be the same as the application(s) guaranteed by Abcam. For a full list of applications guaranteed by Abcam for ab59477 please see the product overview.
Isolation and characterization of adMSC-Exos. a Electron micrograph of exosomes isolated from adMSC-conditioned medium. The arrowheads indicate exosomes. Original scale bars = 0.5 μm. b Western blot was performed with adMSC-Exos (Exos) or adMSC-conditioned medium (Medium). CD63, HSP70 and CD81 expression levels in exosomes were detected. c Fibroblasts were incubated with Dil-labeled exosomes (Dil-Exos; Dil is shown in red) or carrier control (CON), and nuclei were stained with Hoechst 33,342 (blue). Original scale bars = 50 μm
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Reactivity data
Properties and storage information
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Supplementary information
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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.
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Target data
Publications (30)
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Cell death & disease 16:681 PubMed41053117
2025
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Journal of nanobiotechnology 23:504 PubMed40652239
2025
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Lab on a chip 25:1718-1727 PubMed40007431
2025
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Bioactive materials 42:52-67 PubMed39280584
2024
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Cell reports. Medicine 5:101716 PubMed39241773
2024
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iScience 27:109866 PubMed38840839
2024
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Biotechnology progress 40:e3419 PubMed38247123
2024
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Biochimica et biophysica acta. General subjects 1868:130522 PubMed37995879
2023
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Cell & bioscience 13:89 PubMed37202777
2023
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Frontiers in immunology 13:1097117 PubMed36741391
2023
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