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Anti-PD-L1 [28-8] - Extracellular domain Alexa Fluor® 647 conjugated antibody (ab209960) rabbit monoclonal antibody that is used to detect PD-L1 in Flow Cytometry, ICC/IF. Suitable for Human samples.



- Using biophysical QC, antibody identity is confirmed at a molecular level for unrivalled batch-batch consistency

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Images

Flow Cytometry - Alexa Fluor® 647 Anti-PD-L1 antibody [28-8] - Extracellular domain (AB209960), expandable thumbnail
  • Immunocytochemistry/ Immunofluorescence - Alexa Fluor® 647 Anti-PD-L1 antibody [28-8] - Extracellular domain (AB209960), expandable thumbnail

Publications

Key facts

Isotype
IgG
Host species
Rabbit
Conjugation
Alexa Fluor® 647
Excitation/Emission
Ex: 650nm, Em: 665nm
Storage buffer

pH: 7.4
Preservative: 0.02% Sodium azide
Constituents: PBS, 30% Glycerol (glycerin, glycerine), 1% BSA

Form
Liquid
Clonality
Monoclonal

Immunogen

  • The exact immunogen used to generate this antibody is proprietary information.

Reactivity data

Select an application
Product promiseTestedExpectedPredictedNot recommended
ICC/IFFlow Cyt
Human
Tested
Tested

Tested
Tested

Species
Human
Dilution info
1/100
Notes

This product gave a positive signal in CHO-PDL1 cells fixed with 4% formaldehyde (10 min)

Tested
Tested

Species
Human
Dilution info
1/100
Notes

-

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Target data

Function

Plays a critical role in induction and maintenance of immune tolerance to self (PubMed:11015443, PubMed:28813410, PubMed:28813417, PubMed:31399419). As a ligand for the inhibitory receptor PDCD1/PD-1, modulates the activation threshold of T-cells and limits T-cell effector response (PubMed:11015443, PubMed:28813410, PubMed:28813417, PubMed:36727298). Through a yet unknown activating receptor, may costimulate T-cell subsets that predominantly produce interleukin-10 (IL10) (PubMed:10581077). Can also act as a transcription coactivator: in response to hypoxia, translocates into the nucleus via its interaction with phosphorylated STAT3 and promotes transcription of GSDMC, leading to pyroptosis (PubMed:32929201). The PDCD1-mediated inhibitory pathway is exploited by tumors to attenuate anti-tumor immunity and escape destruction by the immune system, thereby facilitating tumor survival (PubMed:28813410, PubMed:28813417). The interaction with PDCD1/PD-1 inhibits cytotoxic T lymphocytes (CTLs) effector function (By similarity). The blockage of the PDCD1-mediated pathway results in the reversal of the exhausted T-cell phenotype and the normalization of the anti-tumor response, providing a rationale for cancer immunotherapy (By similarity).

Alternative names

CD274, B7H1, PDCD1L1, PDCD1LG1, PDL1, Programmed cell death 1 ligand 1, PD-L1, PDCD1 ligand 1, Programmed death ligand 1, hPD-L1, B7 homolog 1, B7-H1

Recommended products

Anti-PD-L1 [28-8] - Extracellular domain Alexa Fluor® 647 conjugated antibody (ab209960) rabbit monoclonal antibody that is used to detect PD-L1 in Flow Cytometry, ICC/IF. Suitable for Human samples.



- Using biophysical QC, antibody identity is confirmed at a molecular level for unrivalled batch-batch consistency

Key facts

Isotype
IgG
Conjugation
Alexa Fluor® 647
Excitation/Emission
Ex: 650nm, Em: 665nm
Form
Liquid
Clonality
Monoclonal
Immunogen
  • The exact immunogen used to generate this antibody is proprietary information.
Clone number
28-8
Purification technique
Affinity purification Protein A
Concentration
Loading...

Storage

Shipped at conditions
Blue Ice
Appropriate short-term storage duration
1-2 weeks
Appropriate short-term storage conditions
+4°C
Appropriate long-term storage conditions
-20°C
Aliquoting information
Upon delivery aliquot
Storage information
Avoid freeze / thaw cycle, Store in the dark

Notes

Anti-PD-L1 antibody [28-8] has been used as detector antibody in Human PD-L1 SimpleStep ELISA® kit (ab214565).

Patented technology
Our RabMAb® technology is a patented hybridoma-based technology for making rabbit monoclonal antibodies. For details on our patents, please refer to RabMAb® patents.

Alexa Fluor® is a registered trademark of Molecular Probes, Inc, a Thermo Fisher Scientific Company. The Alexa Fluor® dye included in this product is provided under an intellectual property license from Life Technologies Corporation. As this product contains the Alexa Fluor® dye, the purchase of this product conveys to the buyer the non-transferable right to use the purchased product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). As this product contains the Alexa Fluor® dye the sale of this product is expressly conditioned on the buyer not using the product or its components, or any materials made using the product or its components, in any activity to generate revenue, which may include, but is not limited to use of the product or its components: in manufacturing; (ii) to provide a service, information, or data in return for payment (iii) for therapeutic, diagnostic or prophylactic purposes; or (iv) for resale, regardless of whether they are sold for use in research. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, 5781 Van Allen Way, Carlsbad, CA 92008 USA or outlicensing@thermofisher.com.

Supplementary info

This supplementary information is collated from multiple sources and compiled automatically.
Activity summary

PD-L1 also known as Programmed Death-Ligand 1 or CD274 is a protein involved in immune modulation. Mechanically PD-L1 interacts with its receptors particularly PD-1 to regulate cellular immune responses. This transmembrane protein has a calculated molecular weight of approximately 33 kDa. PD-L1 is expressed on various cell types including tumor cells and immune cells such as dendritic cells macrophages and B cells. Its expression is often upregulated in response to inflammatory cytokines.

Biological function summary

PD-L1 plays a central role in immune evasion mechanisms utilized by tumors. It is not part of a larger protein complex but directly interacts with PD-1 and CD80. When PD-L1 binds to PD-1 it sends inhibitory signals leading to decreased T cell activation and proliferation allowing cancer cells to avoid immune destruction. PD-L1 expression provides a mechanism for tumors to suppress immune surveillance facilitating tumor progression.

Pathways

PD-L1 is integral to the immune checkpoint pathway which is an important regulator of immune response. The interaction between PD-L1 and PD-1 provides a mechanism for immune tolerance which is part of the broader adaptive immune system pathway. PD-L1 is related to other immune checkpoint proteins such as CTLA-4 in its function to limit autoreactivity and promote immune homeostasis.

Associated diseases and disorders

PD-L1 is most associated with cancer particularly in tumors such as melanoma and non-small cell lung cancer. PD-L1 expression on tumor cells often correlates with poor prognosis. PD-L1 directly interacts with PD-1 in these cancers a target for immunotherapies such as checkpoint inhibitors which aim to block this interaction and restore immune activity against tumors. PD-L1 involvement extends to autoimmune disorders where altered expression can impact tolerance and lead to immune-related tissue damage.

Product promise

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2 product images

  • Flow Cytometry - Alexa Fluor® 647 Anti-PD-L1 antibody [28-8] - Extracellular domain (ab209960), expandable thumbnail

    Flow Cytometry - Alexa Fluor® 647 Anti-PD-L1 antibody [28-8] - Extracellular domain (ab209960)

    Overlay histgram showing CHO (blue line) and CHO-PD-L1 transfected (red line) cells stained with ab209960.

    The cells were incubated in 1x PBS / 10% normal goat serum to block non-specific protein-protein interactions followed by the antibody (ab209960, 1/100 dilution) for 30 min at 4°C.

    Acquisition of >5,000 events were collected using a 17mW red Helium-Neon laser (633nm) and 660/20 bandpass filter.

  • Immunocytochemistry/ Immunofluorescence - Alexa Fluor® 647 Anti-PD-L1 antibody [28-8] - Extracellular domain (ab209960), expandable thumbnail

    Immunocytochemistry/ Immunofluorescence - Alexa Fluor® 647 Anti-PD-L1 antibody [28-8] - Extracellular domain (ab209960)

    ab209960 staining PDL1 in CHO-PDL1 cells. The lower panels demonstrate that ab209960 does not cross react with un-transfected CHO cells.

    The cells were fixed with 4% formaldehyde (10 min), permeabilized with 0.1% Triton X-100 for 5 minutes and then blocked with 1% BSA/10% normal goat serum/0.3M glycine in 0.1% PBS-Tween for 1h. The cells were then incubated overnight at +4°C with ab209960 at 1/200 dilution (shown in red) and Alexa Fluor® 488 Anti-alpha Tubulin antibody [DM1A] - Microtubule Marker ab195887, Mouse monoclonal to alpha Tubulin (Alexa Fluor® 488), at 1/250 dilution (shown in green). Nuclear DNA was labeled with DAPI (shown in blue).

    Image was taken with a confocal microscope (Leica-Microsystems, TCS SP8).

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Product protocols

For this product, it's our understanding that no specific protocols are required. You can:

Please note: All products are 'FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC OR THERAPEUTIC PROCEDURES'.

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