- EH12.2H7 (See other available formats)
- Regulatory Status
- Other Names
- Mouse IgG1, κ
- Ave. Rating
- Submit a Review
- Product Citations
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Programmed cell death 1 (PD-1), also known as CD279, is a 55 kD member of the immunoglobulin superfamily. CD279 contains the immunoreceptor tyrosine-based inhibitory motif (ITIM) in the cytoplasmic region and plays a key role in peripheral tolerance and autoimmune disease. CD279 is expressed predominantly on activated T cells, B cells, and myeloid cells. PD-L1 (B7-H1) and PD-L2 (B7-DC) are ligands of CD279 (PD-1) and are members of the B7 gene family. Evidence suggests overlapping functions for these two PD-1 ligands and their constitutive expression on some normal tissues and upregulation on activated antigen-presenting cells. Interaction of CD279 ligands results in inhibition of T cell proliferation and cytokine secretion.Product Details
- Verified Reactivity
- Reported Reactivity
- African Green, Baboon, Chimpanzee, Common Marmoset, Cynomolgus, Rhesus, Squirrel Monkey
- Antibody Type
- Host Species
- Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide and BSA (origin USA)
- The antibody was purified by affinity chromatography, and conjugated with PE under optimal conditions.
- Lot-specific (to obtain lot-specific concentration, please enter the lot number in our Concentration and Expiration Lookup or Certificate of Analysis online tools.)
- Storage & Handling
- The CD279 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
SB - 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 5 µl per million cells in 100 µl staining volume or 5 µl per 100 µl of whole blood.
- Excitation Laser
Blue Laser (488 nm)
Green Laser (532 nm)/Yellow-Green Laser (561 nm)
- Application Notes
Additional reported applications (for the relevant formats) include: blocking of ligand binding1-3, immunohistochemical staining of paraformaldehyde fixed frozen sections13, and spatial biology (IBEX)15,16. The LEAF™ purified antibody (Endotoxin <0.1 EU/µg, Azide-Free, 0.2 µm filtered) is recommended for functional assays (Cat. No. 329911 and 329912). For highly sensitive assays, we recommend Ultra-LEAF™ purified antibody (Cat. No. 329926) with a lower endotoxin limit than standard LEAF™ purified antibodies (Endotoxin <0.01 EU/µg).
- Additional Product Notes
Iterative Bleaching Extended multi-pleXity (IBEX) is a fluorescent imaging technique capable of highly-multiplexed spatial analysis. The method relies on cyclical bleaching of panels of fluorescent antibodies in order to image and analyze many markers over multiple cycles of staining, imaging, and, bleaching. It is a community-developed open-access method developed by the Center for Advanced Tissue Imaging (CAT-I) in the National Institute of Allergy and Infectious Diseases (NIAID, NIH).
(PubMed link indicates BioLegend citation)
- Dorfman DM, et al. 2006 Am. J. Surg. Pathol. 30:802. (FA)
- Radziewicz H, et al. 2007. J. Virol. 81:2545. (FA)
- Velu V, et al. 2007. J. Virol. 81:5819. (FA)
- Zahn RC, et al. 2008. J. Virol. 82:11577. PubMed
- Chang WS, et al. 2008. J. Immunol. 181:6707. (FC) PubMed
- Nakamoto N, et al. 2009. PLoS Pathog. 5:e1000313. (FA)
- Jones RB, et al. 2009. J. Virol. 83:8722. (FC) PubMed
- Vojnov L, et al. 2010. J. Virol. 84:753. (FC) PubMed
- Radziewicz H, et al. 2010. J. Immunol. 184:2410. (FC) PubMed
- Monteriro P, et al. 2011. J. Immunol. 186:4618. PubMed
- Conrad J, et al. 2011. J. Immunol. 186:6871. PubMed
- Salisch NC, et al. 2010. J. Immunol. 184:476. (Rhesus reactivity)
- Li H and Pauza CD. 2015. Eur. J. Immunol. 45:298. (IHC)
- Peterson VM, et al. 2017. Nat. Biotechnol. 35:936. (PG)
- Radtke AJ, et al. 2020. Proc Natl Acad Sci USA. 117:33455-33465. (SB) PubMed
- Radtke AJ, et al. 2022. Nat Protoc. 17:378-401. (SB) PubMed
- Product Citations
AB_940481 (BioLegend Cat. No. 329905)
AB_940483 (BioLegend Cat. No. 329906)
- Immunoglobulin superfamily
Transiently expressed on CD4- CD8- thymocytes; upregulated in thymocytes and splenic T and B lymphocytes; expressed on activated myeloid cells
- B7-H1 (also known as PD-L1) and B7-DC (PD-L2)
- Cell Type
- B cells, Lymphocytes, T cells, Thymocytes, Tregs
- Biology Area
- Cancer Biomarkers, Immunology, Inhibitory Molecules
- Molecular Family
- CD Molecules, Immune Checkpoint Receptors
- Gene ID
- 5133 View all products for this Gene ID
- View information about CD279 on UniProt.org
- What type of PE do you use in your conjugates?
- We use R-PE in our conjugates.
- If an antibody clone has been previously successfully used in IBEX in one fluorescent format, will other antibody formats work as well?
It’s likely that other fluorophore conjugates to the same antibody clone will also be compatible with IBEX using the same sample fixation procedure. Ultimately a directly conjugated antibody’s utility in fluorescent imaging and IBEX may be specific to the sample and microscope being used in the experiment. Some antibody clone conjugates may perform better than others due to performance differences in non-specific binding, fluorophore brightness, and other biochemical properties unique to that conjugate.
- Will antibodies my lab is already using for fluorescent or chromogenic IHC work in IBEX?
Fundamentally, IBEX as a technique that works much in the same way as single antibody panels or single marker IF/IHC. If you’re already successfully using an antibody clone on a sample of interest, it is likely that clone will have utility in IBEX. It is expected some optimization and testing of different antibody fluorophore conjugates will be required to find a suitable format; however, legacy microscopy techniques like chromogenic IHC on fixed or frozen tissue is an excellent place to start looking for useful antibodies.
- Are other fluorophores compatible with IBEX?
Over 18 fluorescent formats have been screened for use in IBEX, however, it is likely that other fluorophores are able to be rapidly bleached in IBEX. If a fluorophore format is already suitable for your imaging platform it can be tested for compatibility in IBEX.
- The same antibody works in one tissue type but not another. What is happening?
Differences in tissue properties may impact both the ability of an antibody to bind its target specifically and impact the ability of a specific fluorophore conjugate to overcome the background fluorescent signal in a given tissue. Secondary stains, as well as testing multiple fluorescent conjugates of the same clone, may help to troubleshoot challenging targets or tissues. Using a reference control tissue may also give confidence in the specificity of your staining.
- How can I be sure the staining I’m seeing in my tissue is real?
In general, best practices for validating an antibody in traditional chromogenic or fluorescent IHC are applicable to IBEX. Please reference the Nature Methods review on antibody based multiplexed imaging for resources on validating antibodies for IBEX.
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Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors.
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Brilliant Violet 421™ anti-human CD279 (PD-1)
Purified anti-human CD279 (PD-1)
FITC anti-human CD279 (PD-1)
PE anti-human CD279 (PD-1)
APC anti-human CD279 (PD-1)
Alexa Fluor® 647 anti-human CD279 (PD-1)
PerCP/Cyanine5.5 anti-human CD279 (PD-1)
APC/Cyanine7 anti-human CD279 (PD-1)
Pacific Blue™ anti-human CD279 (PD-1)
PE/Cyanine7 anti-human CD279 (PD-1)
Purified anti-human CD279 (PD-1) (Maxpar® Ready)
Brilliant Violet 605™ anti-human CD279 (PD-1)
Ultra-LEAF™ Purified anti-human CD279 (PD-1)
Brilliant Violet 711™ anti-human CD279 (PD-1)
Brilliant Violet 785™ anti-human CD279 (PD-1)
Brilliant Violet 510™ anti-human CD279 (PD-1)
Biotin anti-human CD279 (PD-1)
PE/Dazzle™ 594 anti-human CD279 (PD-1)
Alexa Fluor® 488 anti-human CD279 (PD-1)
PerCP anti-human CD279 (PD-1)
GoInVivo™ Purified anti-human CD279 (PD-1)
Brilliant Violet 650™ anti-human CD279 (PD-1)
Alexa Fluor® 700 anti-human CD279 (PD-1)
APC/Fire™ 750 anti-human CD279 (PD-1)
TotalSeq™-A0088 anti-human CD279 (PD-1)
TotalSeq™-B0088 anti-human CD279 (PD-1)
TotalSeq™-C0088 anti-human CD279 (PD-1)
Brilliant Violet 750™ anti-human CD279 (PD-1)
TotalSeq™-D0088 anti-human CD279 (PD-1)
PE/Fire™ 640 anti-human CD279 (PD-1)
PE/Cyanine5 anti-human CD279 (PD-1)