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PE Rat Anti-Mouse CD137
Product Details
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BD Pharmingen™
4-1BB; Tnfrsf9; Ly-63; ILA
Mouse (QC Testing)
Rat SD, also known as Sprague-Dawley (outbred) IgG1, κ
Recombinant mouse 4-1BB
Flow cytometry (Routinely Tested), Intracellular staining (flow cytometry) (Tested During Development)
0.2 mg/ml
Aqueous buffered solution containing ≤0.09% sodium azide.

Preparation And Storage

The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated with R-PE under optimum conditions, and unconjugated antibody and free PE were removed. Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze.

Recommended Assay Procedures

Precautions for flow cytometry:  An enhancement in the detection of CD137 has been reported when analyzing cells fixed and permeabilized with the BD Cytofix/Cytoperm™ Kit (Cat. No. 554714). It has not been determined whether this increased level is due to the presence of cytoplasmic antigen or due to an increased accessibility of the epitope by the permeabilization procedure.

Product Notices

  1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  2. Please refer to for technical protocols.
  3. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at
  4. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
558976 Rev. 9
Antibody Details
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The 1AH2 monoclonal antibody specifically binds to CD137. CD137 is a member of the TNFR/NGFR superfamily that is likewise known as Tnfrsf9, 4-1BB, Ly-63, or ILA. Monomers or multimeric forms of CD137 are expressed, upon activation, on the surface of splenic T lymphocytes, thymocytes, intestinal intraepithelial T lymphocytes (IEL), and some T cell lines and clones. While stimulating T cells by IL-2, IL-4, or anti-CD28 alone does not result in the expression of CD137; addition of IL-2, IL-4, anti-CD28, or syngeneic accessory cells to splenic T cells stimulated via TCR/CD3 can result in a high level CD137 expression. CD137 is also reportedly expressed on IL-2 activated NK cells, but not on freshly isolated NK cells. CD137 physically associates with p56 [lck] through a Cys-Arg-Cys-Pro binding site in its cytoplasmic domain; the same motif in the cytoplasmic tail of the CD4 and CD8a molecules is responsible for association with p56 [lck]. A signaling function for the CD137 molecule in mouse T cells is indicated by reports in which cross-linking of CD137 with 1AH2 mAb resulted in enhanced proliferation of CD3e-activated splenic T cells and IEL and in enhanced cytolytic activity of IEL in response to immobilized anti-CD3e. In addition to extracellular matrix proteins which bind to CD137, the CD137L (4-1BBL) serves as a ligand for CD137. This molecule has also been detected on LPS-activated macrophages, and anti-IgM antibody-activated splenic B cells. Interaction between T and B cells through CD137/CD137L is reported to play a role in antigen presentation, further supporting a costimulatory role for CD137 in the immune response of T lymphocytes.

558976 Rev. 9
Format Details
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R-Phycoerythrin (PE), is part of the BD family of Phycobiliprotein dyes. This fluorochrome is a multimeric fluorescent phycobiliprotein with excitation maximum (Ex Max) of 496 nm and 566 nm and an emission maximum (Em Max) at 576 nm. PE is designed to be excited by the Blue (488 nm), Green (532 nm) and Yellow-Green (561 nm) lasers and detected using an optical filter centered near 575 nm (e.g., a 575/26-nm bandpass filter). As PE is excited by multiple lasers, this can result in cross-laser excitation and fluorescence spillover on instruments with various combinations of Blue, Green, and Yellow-Green lasers. Please ensure that your instrument’s configurations (lasers and optical filters) are appropriate for this dye.
Yellow-Green 488 nm, 532 nm, 561 nm
496 nm, 566 nm
576 nm
558976 Rev.9
Citations & References
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Development References (11)

  1. Chalupny NJ, Peach R, Hollenbaugh D, Ledbetter JA, Farr AG, Aruffo A. T-cell activation molecule 4-1BB binds to extracellular matrix proteins. Proc Natl Acad Sci U S A. 1992; 89(21):10360-10364. (Biology). View Reference
  2. DeBenedette MA, Chu NR, Pollok KE, et al. Role of 4-1BB ligand in costimulation of T lymphocyte growth and its upregulation on M12 B lymphomas by cAMP. J Exp Med. 1995; 181(3):985-992. (Biology). View Reference
  3. DeBenedette MA, Shahinian A, Mak TW, Watts TH. Costimulation of CD28- T lymphocytes by 4-1BB ligand. J Immunol. 1997; 158(2):551-559. (Biology). View Reference
  4. Hurtado JC, Kim SH, Pollok KE, Lee ZH, Kwon BS. Potential role of 4-1BB in T cell activation. Comparison with the costimulatory molecule CD28. J Immunol. 1995; 155(7):3360-3367. (Biology). View Reference
  5. Hurtado JC, Kim YJ, Kwon BS. Signals through 4-1BB are costimulatory to previously activated splenic T cells and inhibit activation-induced cell death. J Immunol. 1997; 158(6):2600-2609. (Biology). View Reference
  6. Kim YJ, Pollok KE, Zhou Z, et al . Novel T cell antigen 4-1BB associates with the protein tyrosine kinase p56lck1. J Immunol. 1993; 151(3):1255-1262. (Biology). View Reference
  7. Pollok KE, Kim SH, Kwon BS. Regulation of 4-1BB expression by cell-cell interactions and the cytokines, interleukin-2 and interleukin-4. Eur J Immunol. 1995; 25(2):488-494. (Biology). View Reference
  8. Pollok KE, Kim YJ, Zhou Z, et al. Inducible T cell antigen 4-1BB. Analysis of expression and function. J Immunol. 1993; 150(3):771-781. (Immunogen). View Reference
  9. Saoulli K, Lee SY, Cannons JL, et al. CD28-independent, TRAF2-dependent costimulation of resting T cells by 4-1BB ligand. J Exp Med. 1998; 187(11):1849-1862. (Biology). View Reference
  10. Takeda K, Oshima H, Hayakawa Y, et al. CD27-mediated activation of murine NK cells. J Immunol. 2000; 164(4):1741-1745. (Biology). View Reference
  11. Zhou Z, Pollok KE, Kim KK, Kim YJ, Kwon BS. Functional analysis of T-cell antigen 4-1BB in activated intestinal intra-epithelial T lymphocytes. Immunol Lett. 1994; 41(2-3):177-184. (Biology). View Reference
View All (11) View Less
558976 Rev. 9

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