CD81 Recombinant Monoclonal Mouse Antibody (2304.81) – Biotium Choice
CD81 (clone 2304.81) is a validated recombinant mouse monoclonal antibody that recognizes the human tetraspanin protein CD81. The antibody belongs to the Biotium Choice list of select antibodies that have been formulated and validated in-house for optimal performance.
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Product Description
CD81 (clone 2304.81) is a recombinant mouse monoclonal antibody that recognizes the human tetraspanin protein CD81. This antibody belongs to the Biotium Choice list of select antibodies that have been formulated and validated in-house for optimal performance. This antibody has been validated in flow cytometry and immunofluorescence microscopy. The antibody is available unlabeled or conjugated to CF® Dyes and Astral™ tandem dyes.
CD81 has a very broad cellular distribution, being expressed on T- and B-lymphocytes, NK cells, thymocytes, eosinophils, fibroblasts, epithelial and endothelial cells. Neutrophils, erythrocytes and platelets are negative, while monocytes are variably positive. CD81 is a member of a family of tetraspanin transmembrane proteins, including CD9, CD37, CD53, CD63, and CD82. It associates with CD19, CD21, Leu 13, and integrins on cell membrane and is involved in signal transduction in B lymphocyte development and cell adhesion. CD81 also acts as a receptor for the envelope protein E2 of chronic hepatitis C virus. Antibodies to CD81 have anti-proliferative effects on different lymphoid cell lines, particularly those derived from large cell lymphomas.
Tetraspanin proteins CD9, CD63, and CD81, are the most common proteins used as exosome markers. Tetraspanins are plasma membrane proteins with many proposed functions, including activation and sorting of other membrane proteins. They are also thought to play a role in the targeting of proteins to multivesicular bodies (MVBs) and exosomes. These tetraspanins are broadly expressed on many cell types and can therefore be detected on many types of exosomes, but their expression levels vary depending on the cell type of origin.
As an isotype control, we recommend Isotype Control, Monoclonal Mouse IgG1 Kappa (IGG1/1331) for this antibody. View our full catalog of Biotium Choice antibodies, optimized and validated for the best results in flow cytometry.
Exosome Stains and Antibodies
Biotium also offers ExoBrite™ CD81 Flow Antibody and ExoBrite™ CD81 Western Antibody that are validated for optimal detection of isolated exosomes by flow cytometry or western blotting. Learn more about our products for exosome research.
Conjugation | Ex/Em | Conc. | Size | Catalog No. | Dye Features |
---|---|---|---|---|---|
CF®405M | 416/452 nm | 100 ug/mL | 25 tests (125 uL) | P014-405M-125 | CF®405M Features |
100 tests (500 uL) | P014-405M-500 | ||||
CF®488A | 490/516 nm | 100 ug/mL | 25 tests (125 uL) | P014-488A-125 | CF®488A Features |
100 tests (500 uL) | P014-488A-500 | ||||
CF® 568 | 562/584 nm | 100 ug/mL | 25 tests (125 uL) | P014-568-125 | CF®568 Features |
100 tests (500 uL) | P014-568-500 | ||||
CF® 583R | 585/609 nm | 100 ug/mL | 25 tests (125 uL) | P014-583R-125 | CF®583R Features |
100 tests (500 uL) | P014-583R-500 | ||||
RPE-Astral™616 | 496, 546, 566/617 nm | 100 ug/mL | 25 tests (125 uL) | P014-R616-125 | |
100 tests (500 uL) | P014-R616-500 | ||||
CF® 647Plus | 652/668 nm | 100 ug/mL | 25 tests (125 uL) | P014-647P-125 | CF®647Plus Features |
100 tests (500 uL) | P014-647P-500 | ||||
CF®700 | 696/721 nm | 100 ug/mL | 25 tests (125 uL) | P014-700-125 | CF®700 Features |
100 tests (500 uL) | P014-700-500 | ||||
R-PE | 496, 546, 565/576 nm | 100 ug/mL | 25 tests (125 uL) | P014-RPE-125 | |
100 tests (500 uL) | P014-RPE-500 | ||||
APC | 651/660 nm | 100 ug/mL | 25 tests (125 uL) | P014-APC-125 | |
100 tests (500 uL) | P014-APC-500 | ||||
Purified (BSA-free) | N/A | 5 mg/mL | 1 mg | P014-1MG | |
5 mg | P014-5MG |