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Human/Mouse IL‑12 R beta2 PE‑conjugated Antibody

Catalog # FAB1959P | R&D Systems, Inc. a Bio-Techne Brand
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Key Product Details

Species Reactivity

Human, Mouse


Flow Cytometry


Phycoerythrin (Excitation = 488 nm, Emission = 565-605 nm)

Antibody Source

Monoclonal Mouse IgG1 Clone # 305719

Product Summary for Human/Mouse IL‑12 R beta2 PE‑conjugated Antibody


Mouse myeloma cell line NS0-derived recombinant human IL-12 R beta2
Accession # Q99665


Detects human and mouse IL-12 R beta2 in direct ELISAs. In direct ELISAs, no cross-reactivity with recombinant human IL-1 R beta1 is observed.







Scientific Data Images for Human/Mouse IL‑12 R beta2 PE‑conjugated Antibody

Detection of IL-12 R beta2 antibody in Human TH1 cells antibody by Flow Cytometry.

Detection of IL‑12 R beta2 in Human TH1 cells by Flow Cytometry.

Human CD4+peripheral blood mononuclear cells (PBMCs) either (A) untreated or (B) treated with 1 ug/mL plate-bound Mouse Anti-Human CD3e Monoclonal Antibody (Catalog # MAB100), 10 ng/mL Recombinant Human IL-12 (Catalog # 219-IL), and 10 ng/mL Recombinant Human IL-2 (Catalog # 202-IL) for 5 days to induce Th1 cell development, followed by restimulation with 50 ng/mL PMA and 200 ng/mL Calcium Ionomycin for 2 to 3 hours, were stained with Mouse Anti-Human CD4 APC-conjugated Monoclonal Antibody (Catalog # FAB3791A) and Mouse Anti-Human/Mouse IL-12 R beta2 PE-conjugated Monoclonal Antibody (Catalog # FAB1959P). Quadrant markers were set based on staining using Mouse IgG1Phycoerythrin Isotype Control (Catalog # IC002P). View our protocol for Staining Membrane-associated Proteins.

Applications for Human/Mouse IL‑12 R beta2 PE‑conjugated Antibody

Recommended Usage

Flow Cytometry

10 µL/106 cells
Sample: Human CD4+ peripheral blood mononuclear cells (PBMCs) treated with Mouse Anti-Human CD3 epsilon Monoclonal Antibody (Catalog # MAB100), Recombinant Human IL‑12 (Catalog # 219-IL), and Recombinant Human IL‑2 (Catalog # 202-IL) to induce Th1 cell development, followed by restimulation with PMA and Calcium Ionomycin.
Please Note: Optimal dilutions of this antibody should be experimentally determined.

Formulation, Preparation and Storage


Protein A or G purified from hybridoma culture supernatant


Supplied in a saline solution containing BSA and Sodium Azide.


The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Protect from light. Do not freeze.
  • 12 months from date of receipt, 2 to 8 °C as supplied.

Background: IL-12 R beta 2

Interleukin 12 (IL-12), the founding member of the IL-12 family of heterodimeric cytokines, is composed of two disulfide-linked 35 kDa and 40 kDa subunits. The 35 kDa subunit (p35) is a alpha-helical protein homologous to IL-6 and G-CSF. The 40 kDa subunit (p40) contains one fibronectin type III and one Ig C2-like domain, and has a high degree of structural homology to type I cytokine receptors. Whereas p35 subunit is unique to IL-12, the p40 subunit is also a subunit of IL-23. IL-12 is an essential mediator of cellular-immunity that induces T cells and natural-killer cells to produce IFN-gamma. It is also required for the expansion and activation Th1 cells (1, 2).

The biological activities of IL-12 are mediated through the high-affinity receptor complex composed of the IL-12 Receptor beta1 (IL-12 R beta1) and IL-12 Receptor beta2 (IL‑12 R beta2) subunits. IL-12 R beta1 is a 100 kDa protein that is also a subunit of the IL-23 receptor complex. It binds IL-12/IL-23 p40 and is associated with Tyk2. IL‑12 R beta2 is a 130 kDa protein that interacts with p35 and is associated with Jak2. Both receptor subunits are type I membrane proteins that share similarities with the gp130/G-CSF R subgroup in the cytokine receptor superfamily. IL-12 R beta2 cDNA encodes a 862 amino acid (aa) protein with a putative 27 aa signal peptide that is cleaved to generate the mature protein with a 595 aa extracellular domain, a 24 aa transmembrane domain and a 216 aa cytoplasmic region. Human and mouse IL‑12 R beta2 share 68% amino acid sequence identity. Whereas IL-12 R beta1 expression has been detected in activated T cells, NK cells and B cells, the expression of IL‑12 R beta2 is more restricted. Among T cells, IL-12 R beta2 is absent on naive T cells. Activation of T cells via TCR up‑regulates IL‑12 R beta2 expression on human Th1 but not Th2 cells (1‑4).


  1. Trinchieri, G. et al. (2003) Immunity 19:641. 
  2. Brombacher, F. et al. (2003) Trends in Immunol. 23:207. 
  3. Trinchieri, G. (2003) Nature Reviews Immunol. 3:133.
  4. Rogge, L. et al. (1997) J. Exp. Med. 185:825.

Long Name

Interleukin 12 Receptor beta 2

Alternate Names

IL-12Rb2, IL12R beta 2, IL12RB2

Entrez Gene IDs

3595 (Human); 16162 (Mouse)

Gene Symbol



Product Documents

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Human/Mouse IL‑12 R beta2 PE‑conjugated Antibody

For research use only

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