- 29E.2A3 (See other available formats)
- Other Names
- Programmed cell death ligand 1 (PD-L1), B7 homolog 1 (B7-H1)
- Mouse IgG2b, κ
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- Product Citations
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CD274, also known as PD-L1 and B7-H1, is type I transmembrane glycoprotein that serves as a ligand for CD279 (PD-1). This interaction is believed to regulate the balance between the stimulatory and inhibitory signals needed for responses to microbes and maintenance of self-tolerance. CD274 is involved in the costimulation of T cell proliferation and IL-10 and IFN-γ production in an IL-2-dependent and CD279-independent manner. Conflicting data has shown that CD274 can inhibit T cell proliferation and cytokine production, and alternatively, enhance T cell activation. Other studies suggest that CD274 may signal bidirectionally, raising interesting implications for its expression in a wide variety of cell types, including T and B cells, antigen-presenting cells, and nonhematopoietic cells.Product Details
- Human, African Green, Baboon, Cynomolgus, Rhesus
- Antibody Type
- Host Species
- Full length human PD-L1
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and 0.2% (w/v) BSA (origin USA).
- The antibody was purified by affinity chromatography, and conjugated with APC under optimal conditions.
- Lot-specific (please contact technical support for concentration and total µg amount, or use our Lookup tool if you have a lot number.)
- Storage & Handling
- The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.
FC - Quality tested
- Recommended Usage
Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is 5 µl per million cells in 100 µl staining volume or 5 µl per 100 µl of whole blood.
- Excitation Laser
Red Laser (633 nm)
- Application Notes
Clone 29E.2A3 is reported to recognize an epitope on PD-L1 within the PD-L1-CD80 binding region5. Additional reported applications (for the relevant formats) include: blocking1-3 and immunohistochemical staining of acetone-fixed frozen sections1. The Ultra-LEAF™ purified antibody (Endotoxin < 0.01 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays (Cat. No. 329715, 329716, 329745 - 329748).
It has been observed that clone 29E.2A3 is able to bind to Alexa Fluor® 700 antibody conjugates during multi-color immunofluorescent staining. This interaction can be resolved by sequentially staining with the 29E.2A3 antibody first and then followed by the Alexa Fluor® 700 conjugate of interest.
Clone 29E.2A3 does not work in Western blot applications7.
(PubMed link indicates BioLegend citation)
- Brown J, et al. 2003. J. Immunol. 170:1257. (FC, IHC, Block)
- Radziewicz H, et al. 2007. J. Virol. 81:2545. (Block)
- Nakamoto N, et al. 2009. PLoS Pathog. 5:e1000313. (Block)
- Barsoum IB, et al. 2014. Cancer Res. 74:665. PubMed
- Haile, S et al. 2013. J. Immunol. 191:2829.
- RL M, et al. 2015. PNAS. 112:6506-6514. PubMed
- Mahoney KM, et al. 2015. Cancer Immunol. Res. 3:1308.
- Product Citations
AB_940358 (BioLegend Cat. No. 329707)
AB_940360 (BioLegend Cat. No. 329708)
T cells, B cells, NK cells, monocytes/macrophages, granulocytes and dendritic cells
- CD274 is involved in the costimulatory signal, essential for T lymphocyte proliferation and production of IL-10 and IFN-γ, in an IL-2-dependent and a PD-1-CD1-independent manner. Its interaction with PD-1-CD1 inhibits T-cell proliferation and cytokine production.
- PD-1 (PDCD1)
- Cell Type
- B cells, Dendritic cells, Fibroblasts, Granulocytes, Macrophages, Monocytes, NK cells, T cells
- Biology Area
- Cancer Biomarkers, Costimulatory Molecules, Immunology
- Molecular Family
- Adhesion Molecules, CD Molecules, Immune Checkpoint Receptors
- Antigen References
1. Sharpe A, et al. 2007. Nat. Immunol. 8:239.
- Gene ID
- 29126 View all products for this Gene ID
- View information about CD274 on UniProt.org
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