Biolegend, 329702, Purified anti-human CD274 (B7-H1, PD-L1) Antibody, 100μg

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.
100μg
Verified Reactivity: Human
Reported Reactivity: African Green, Baboon, Cynomolgus, Rhesus
Antibody Type: Monoclonal
Host Species: Mouse
Immunogen: Full length human PD-L1
Formulation: Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
Preparation: The antibody was purified by affinity chromatography.
Concentration: 0.5 mg/ml
Storage & Handling: The antibody solution should be stored undiluted between 2°C and 8°C.
Application: FC - Quality tested IHC-P - Verified Block - Reported in the literature, not verified in house
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 ≤0.5 µg per million cells in 100 µl volume. For immunohistochemical staining on formalin-fixed paraffin-embedded tissue sections, the suggested use of this reagent is 5.0 - 10 µg per ml. It is recommended that the reagent be titrated for optimal performance for each application.
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.
Application References(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.
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RRID: AB_940370 (BioLegend Cat. No. 329701) AB_940372 (BioLegend Cat. No. 329702)
Distribution: T cells, B cells, NK cells, monocytes/macrophages, granulocytes and dendritic cells
Function: 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.
Ligand/Receptor: 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
UniProt: View information about CD274 on UniProt.org
Clone: 29E.2A3
Regulatory Status: RUO
Other Names: Programmed cell death ligand 1 (PD-L1), B7 homolog 1 (B7-H1)
Isotype: Mouse IgG2b, κ