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Your Position: Home > Immune Checkpoint Proteins > Human PDL1 /CD274 Protein,C-Twin Strep Tag

Human PD-L1 / B7-H1 Protein, Strep Tag

  • Synonym
    PD-L1,CD274,B7-H1,PDCD1L1,PDCD1LG1
  • Source
    Human PD-L1, Strep Tag (PD1-H5282) is expressed from human 293 cells (HEK293). It contains AA Phe 19 - Arg 238 (Accession # NP_054862.1).
    Predicted N-terminus: Phe 19
  • Molecular Characterization
    PD-L1(Phe 19 - Arg 238) NP_054862.1

    This protein carries a twin strep tag at the C-terminus.

    The protein has a calculated MW of 28.2 kDa. The protein migrates as 35-42 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >95% as determined by SDS-PAGE.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.

    Contact us for customized product form or formulation.

  • Reconstitution

    Please see Certificate of Analysis for specific instructions.

    For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

  • Storage

    For long term storage, the product should be stored at lyophilized state at -20°C or lower.

    Please avoid repeated freeze-thaw cycles.

    No activity loss is observed after storage at:

    1. 4-8°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
SDS-PAGE
Human PD-L1, Strep Tag (Cat. No. PD1-H5282) SDS-PAGE gel

Human PD-L1, Strep Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

Bioactivity
Human PD-L1, Strep TagHuman PD-L1, Strep Tag (Cat. No. PD1-H5282) ELISA bioactivity

Immobilized Human PD-L1, Strep Tag (Cat. No. PD1-H5282) at 5 μg/mL ( 100 μl/well ) can bind Biotinylated Human PD-1, His Tag & Fc tag (Cat. No. PD1-H82F2) with a linear range of 2-60 ng/mL (QC tested).

  • Background
    Programmed cell death 1 ligand 1 (PD-L1) is also known as cluster of differentiation (CD274) or B7 homolog 1 (B7-H1), is a member of the growing B7 family of immune molecules and is involved in the regulation of cellular and humoral immune responses. B7-H1 is a cell surface immunoglobulin superfamily with two Ig-like domains within the extracellular region and a short cytoplasmic domain. PD-L1 is highly expressed in the heart, skeletal muscle, placenta and lung and weakly expressed in the thymus, spleen, kidney and liver. PD-L1 is expressed on activated T-cells, B-cells, dendritic cells, keratinocytes and monocytes. PD-L1 is up-regulated on T- and B-cells, dendritic cells, keratinocytes and monocytes after LPS and IFNG activation and up-regulated in B-cells activated by surface Ig cross-linking. PD-L1 involve in the costimulatory signal, essential for T-cell proliferation and production of IL10 and IFNG, in an IL2-dependent and a PDCD1-independent manner.
  • References
  • Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.

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