Detects 4‑1BB/TNFRSF9/CD137 in direct ELISAs and Western blots. In sandwich immunoassays, less than 0.1% cross-reactivity with recombinant mouse (rm) 4-1BB, recombinant human (rh) NGF R, rhTNF RI and rhTNF RII is observed.
Polyclonal Goat IgG
Mouse myeloma cell line NS0-derived recombinant human 4‑1BB/TNFRSF9/CD137 Leu24-Gln186 Accession # Q07011
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
<0.10 EU per 1 μg of the antibody by the LAL method.
Detection of Human 4‑1BB/TNFRSF9/ CD137 by Western Blot.
Western blot shows lysates of HEK293T human embryonic kidney cell line either mock transfected or transfected with human 4-1BB/TNFRSF9/ CD137. PVDF membrane was probed with 0.5 µg/mL of Goat Anti-Human 4‑1BB/ TNFRSF9/CD137 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF838) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF017). A specific band was detected for 4‑1BB/ TNFRSF9/CD137 at approximately 50-65 kDa (as indicated). This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.
Detection of 4‑1BB/TNFRSF9/CD137 in PHA-treated Human T Cells by Flow Cytometry.
Human T cells were treated for 48 hours with 5 μg/mL PHA then stained with Goat Anti-Human 4‑1BB/TNFRSF9/ CD137 Antigen Affinity‑purified Polyclonal Antibody (Catalog # AF838) followed by Allophycocyanin-conjugated Anti-Goat IgG Secondary Antibody (Catalog # F0108) and PE-conjugated anti-human CD3 (Catalog # FAB100P). Quad marker was set based on control antibody (Catalog # AB‑108‑C) staining.
4‑1BB/TNFRSF9/CD137 in Human Tonsil.
4‑1BB/TNFRSF9/CD137 was detected in immersion fixed paraffin-embedded sections of human tonsil using Goat Anti-Human 4‑1BB/TNFRSF9/CD137 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF838) at 10 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Goat HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS008) and counterstained with hematoxylin (blue). Specific staining was localized to lymphocytes. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.
Preparation and Storage
Reconstitute at 0.2 mg/mL in sterile PBS.
Reconstitution Buffer Available
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
Stability & Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
6 months, -20 to -70 °C under sterile conditions after reconstitution.
4-1BB is an inducible T cell surface protein belonging to the TNF receptor superfamily. It is alternatively known as TNFRSF9, CD137, and ILA. The 255 amino acid human 4-1BB is a type I transmembrane protein having in its extracellular domain four of the cysteine-rich motifs that are characteristic of the TNF receptor superfamily. The 30 kDa glycoprotein exists both as a monomer and as a dimer on T cells. The human and mouse proteins share 60% amino acid identity. 4-1BB is absent from naive T cells, but it is upregulated and continually expressed following T cell activation. The natural ligand, 4-1BBL, is a member of the TNF superfamily and is expressed on activated antigen presenting cells including dendritic cells, macrophages, and B cells. Cross-linking of 4-1BB by 4-1BBL or by agonistic antibodies transmits a potent co-stimulatory signal that enhances the effect of other activating signals such as PHA or anti-CD3 antibodies. 4-1BB signals through the TFAF2‑NIK pathway resulting in activation of NF-kappa B and ultimately promoting proliferation and survival of T cells.
Vinay, D. and B. Kwon (1998) Semin. Immunol. 10:481.
Sica, G. and L. Chen (2000) Adv. Exp. Med. Biol. 465:355.
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