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Your Position: Home > Immune Checkpoint Proteins > 4-1BB > Recombinant Human 4-1BB / TNFRSF9 / CD137 Protein, low endotoxin

Human 4‑1BB / TNFSF9 Protein, low endotoxin

  • Synonym
    TNFRSF9,4-1BB,CD137,CDw137,ILA
  • Source
    Human 4-1BB, low endotoxin (41B-H522a) is expressed from human 293 cells (HEK293). It contains AA Leu 24 - Gln 186 (Accession # Q07011-1).
    Predicted N-terminus: Leu 24
  • Molecular Characterization
    4-1BB(Leu 24 - Gln 186) Q07011-1

    This protein carries a polyhistidine tag at the C-terminus.

    The protein has a calculated MW of 19.2 kDa. The protein migrates as 33-40 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Endotoxin
    Less than 0.01 EU per μg by the LAL method.
  • Purity

    >90% 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 4-1BB, low endotoxin (Cat. No. 41B-H522a) SDS-PAGE gel

Human 4-1BB, low endotoxin on SDS-PAGE  under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 90%.

Bioactivity
Human 4-1BB, low endotoxinHuman 4-1BB, low endotoxin (Cat. No. 41B-H522a) ELISA bioactivity

Immobilized Human 4‑1BB Ligand, Fc Tag (Cat. No. 41L-H5257) at 2 μg/mL (100 μL/well) can bind Human 4-1BB, low endotoxin (Cat. No. 41B-H522a) with a linear range of 0.5-16 ng/mL (QC tested).

  • Background
    4-1BB is also known as CD137, tumor necrosis factor receptor superfamily member 9 (TNFRSF9), induced by lymphocyte activation (ILA), is a co-stimulatory molecule of the tumor necrosis factor (TNF) receptor superfamily. CD137 can be expressed by activated T cells, but to a larger extent on CD8 than on CD4 T cells. In addition, CD137 expression is found on dendritic cells, follicular dendritic cells, natural killer cells, granulocytes and cells of blood vessel walls at sites of inflammation. The best characterized activity of CD137 is its costimulatory activity for activated T cells. Crosslinking of CD137 enhances T cell proliferation, IL-2 secretion survival and cytolytic activity. Further, it can enhance immune activity to eliminate tumors in mice. CD137 can enhance activation-induced T cell apoptosis when triggered by engagement of the TCR/CD3 complex. In addition, 4-1BB/4-1BBL co-stimulatory pathway has been shown to augment secondary CTL responses to several viruses, and meanwhile augment anti-tumor immunity. 4-1BB thus is a promising candidate for immunotherapy of human cancer. CD137 has been shown to interact with TRAF2.
  • References
  • Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.

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Price(USD) : $2400.00

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