• PN: B113345


45x Ab-conjugated beads (S5P6 - human s4-1BB Ab-bead). PN: B113345A. One vial containing 100 µL of anti-human s4-1BB conjugated to AimPlex Bead S5P6.

25x Biotin-detection Ab (human s4-1BB Biotin-dAb). PN: B113345B. One vial containing 100 µL of biotinylated anti-human s4-1BB

Lyophilized Standard Mix-Human Group 5 Panel A, 8-Plex. PN: HG50008. One vial containing lyophilized recombinant human sE-Cadherin, sLIGHT, sTRAIL-R3, s4-1BB, sCD30L, sVEGFR2, BLyS, and sPECAM-1.  Note: If multiple analyte kits on the above target list are ordered as a panel, only one vial of standard mix is supplied for those analyte kits.

STORAGE:  2-8 C in the dark.

IMPORTANT: Sodium azide forms explosive compounds with heavy metals. These products contain <0.05% (w/w) azide which with repeated contact with lead and copper commonly found in plumbing drains may result in the buildup of shock sensitive compounds. Dispose in accordance with regulations from your institute.

APPLICATION: Optimal antibody pair and antigen standard for assaying human TNFRSF9/sCD137/s4-1BB.  Can be multiplexed with other analytes in Human Group 5.  To be used in conjunction with the AimPlex NR Basic Kit (PN: P100001) and a diluent kit. Refer to the AimPlex Multiplex Immunoassay User Manual and kit inserts for the assay procedure.

For Research Use Only.  Not for use in diagnostic procedures.

Assay Specifications:

Sample types: Cell culture supernatant, serum, plasma, bodily fluid and tissue/cell lysate

Sensitivity (LOD): < 5 pg/mL

Quantitation range:

LLOQ: < 10 pg/mL

ULOQ: > 5,000 pg/mL

Standard dose recovery: 70-130%

Intra-assay CV: < 10%

Inter-assay CV: < 20%

Cross-reactivity of analytes in Human Group 5: Negligible

Sample volume: 15 µL/test


Tumor necrosis factor receptor superfamily member 9 (TNFRSF9) is a member of the tumor necrosis factor (TNF) receptor family; alternative names are sCD137 and 4-1BB. It is induced by lymphocyte activation (ILA) and is currently of interest to immunologists as a co-stimulatory immune checkpoint molecule.  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 co-stimulatory 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.


1.      Jang IK, Lee ZH, Kim YJ, Kim SH, Kwon BS (Jan 1998). "Human 4-1BB (CD137) signals are mediated by TRAF2 and activate nuclear factor-kappa B". Biochem. Biophys. Res. Commun. 242 (3): 613–20. doi:10.1006/bbrc.1997.8016. PMID 9464265.

2.      Arch RH, Thompson CB (Jan 1998). "4-1BB and Ox40 are members of a tumor necrosis factor (TNF)-nerve growth factor receptor subfamily that bind TNF receptor-associated factors and activate nuclear factor kappaB". Mol. Cell. Biol. 18 (1): 558–65. PMC 121523. PMID 9418902.