Human B7-H1/PD-L1 Alexa Fluor® 488-conjugated Antibody

  • Species Reactivity
  • Specificity
    Detects human B7‑H1/PD‑L1 in direct ELISAs. In direct ELISAs, no cross-reactivity with recombinant human (rh) B7-1, -2, -H2, -H3, -H3b,
    -H4, rhPD-L2, recombinant mouse B7-H1, recombinant rat (rr) B7-1, or rrB7-2 is observed.
  • Source
    Monoclonal Mouse IgG1 Clone # 130021
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    Mouse myeloma cell line NS0-derived recombinant human B7‑H1/PD‑L1
    Accession # Q9NZQ7
  • Formulation
    Supplied in a saline solution containing BSA and Sodium Azide.
  • Label
    Alexa Fluor 488
  • Flow Cytometry
    5 µL/106 cells
    See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples

Detection of B7-H1/PD-L1 in Human PBMCs by Flow Cytometry. Human peripheral blood mononuclear cells (PBMCs) (A) resting or (B) treated with 1 μg/mL LPS overnight were stained with Mouse Anti-Human CD14 APC-conjugated Monoclonal Antibody (Catalog # FAB3832A) and Mouse Anti-Human B7-H1/PD-L1 Alexa Fluor® 488-conjugated Monoclonal Antibody (Catalog # FAB1561G). Quadrant markers were set based on control antibody staining (Catalog # IC002G). View our protocol for Staining Membrane-associated Proteins.

Preparation and Storage
  • Shipping
    The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
  • Stability & Storage
    Protect from light. Do not freeze.
    • 12 months from date of receipt, 2 to 8 °C as supplied.
Background: B7-H1/PD-L1

Human B7 homolog 1 (B7-H1), also called programmed death ligand 1 (PD-L1)and  programmed cell death 1 ligand 1 (PDCD1L1), is a member of the growing B7 family of immune proteins that provide signals for both stimulating and inhibiting T cell activation. Other family members include B7-1, B7-2, B7-H2, PDL2 and B7-H3. B7 proteins are members of the immunoglobulin (Ig) superfamily. Their extracellular domains contain 2 Ig-like domains and all members have short cytoplasmic domains. Among the family members, there is about 20-25% amino acid identity. Human and mouse B7-H1 share approximately 70% amino acid sequence identity. B7-H1 has been identified as one of two ligands for programmed death-1 (PD-1), a member of the CD28 family of immunoreceptors. The B7-H1 gene encodes a 291 amino acid (aa) type I membrane precursor protein with a putative 18 aa signal peptide, a 220 aa extracellular domain, a 21 aa transmembrane region, and a 31 aa cytoplasmic domain. Human B7-H1 is constitutively expressed in several organs such as heart, skeletal muscle, placenta and lung, and in lower amounts in thymus, spleen, kidney and liver. B7-H1 expression is upregulated in a small fraction of activated T and B cells and a much larger fraction of activated monocytes. B7-H1 expression is also induced in dendritic cells and keratinocytes after IFN-gamma stimulation. Interaction of B7-H1 with PD-1 results in inhibition of TCR-mediated proliferation and cytokine production. The B7-H1:PD-1 pathway is involved in the negative regulation of some immune responses and may play an important role in the regulation of peripheral tolerance.

  • References:
    1. Nishimura, H. and T. Honjo (2001) Trends Immunol. 22:265.
    2. Freeman, G.J. et al. (2000) J. Exp. Med. 192:1027.
    3. Latchman, Y. et al. (2001) Nat. Immunol. 2:261.
  • Long Name:
    B7 Homolog 1
  • Entrez Gene IDs:
    29126 (Human); 60533 (Mouse); 102145573 (Cynomolgus Monkey)
  • Alternate Names:
    B7-H; B7H1; B7-H1; B7H1PDCD1L1; CD274 antigenMGC142294; CD274 molecule; CD274; PDCD1L1; PDCD1LG1; PDCD1LG1MGC142296; PD-L1; PD-L1B7 homolog 1; PDL1PDCD1 ligand 1; programmed cell death 1 ligand 1; Programmed death ligand 1
Related Research Areas
Isotype Controls
Description Application Cat# Citations Images  

Mouse IgG1 Alexa Fluor® 488-conjugated Antibody

Ctrl IC002G 2  
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....
Staining Reagents
Description Application Cat# Citations Images  

Flow Cytometry Staining Buffer (1X)

Flow FC001 3
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Flow Cytometry Mouse Lyse Buffer (10X)

Flow FC003 1
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Flow Cytometry Human Lyse Buffer (10X)

Flow FC002 1
View Sizes & Prices
Catalog# Size Price Stock Quantity
Loading Information....

Have you used Human B7-H1/PD-L1 Alexa Fluor® 488-conjugated Antibody?

Submit a review and receive a $25 amazon gift card if you include an image - $10 Amazon card for reviews without an image. Limited to verified customers in USA, Canada and Europe.

Order Details

Contact Information

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

Certificate of Analysis Lookup

The document you requested is not available online. Please enter the Catalog Number and Lot Number below to have a document emailed to you at the address provided

Certificate of Analysis Lookup

Research Areas of Interest
R&D Systems Guarantee


Customer Information