Human CD25/IL-2 R alpha PE‑conjugated Antibody

5 citations
  • Specificity
    Detects human CD25/IL-2 R alpha in direct ELISAs and Western blots. In direct ELISAs, no cross-reactivity with recombinant human (rh) IL‑2 R gamma or rhIL‑15 R alpha is observed.
  • Source
    Monoclonal Mouse IgG2A Clone # 24212
  • Purification
    Protein A or G purified from hybridoma culture supernatant
  • Immunogen
    S. frugiperda insect ovarian cell line Sf 21-derived recombinant human CD25/IL-2 R alpha
    Accession # P01589
  • Formulation
    Supplied in a saline solution containing BSA and Sodium Azide.
  • Label
  • Flow Cytometry
    10 µL/106 cells
    See below
Please Note: Optimal dilutions should be determined by each laboratory for each application. General Protocols are available in the Technical Information section on our website.
Data Examples
Detection of Human CD25/IL-2 R alpha in Human PBMCs by Flow Cytometry. Human peripheral blood mononuclear cells (PBMCs) treated with 20 ng/mL Recombinant Human IL‑2 (Catalog # 202-IL) and 10 ng/mL Recombinant Human TGF‑ beta 1 (Catalog #
240-B) for 2 days were stained with Mouse Anti-Human CD4 APC‑conjugated Monoclonal Antibody (Catalog # FAB3791A) and either (A) Mouse Anti-Human CD25/IL-2 R alpha PE‑conjugated Monoclonal Antibody (Catalog # FAB1020P) or (B) Mouse IgG2A Phycoerythrin Isotype Control (Catalog # IC003P). View our protocol for Staining Membrane-associated Proteins.
Preparation and Storage
  • Shipping
    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: CD25/IL-2 R alpha
Human CD25, also known as IL-2 receptor alpha (IL-2 R alpha ) and asTac antigen, was initially identified as a 55 kDa membrane glycoprotein that is capable of binding IL‑2. The IL-2 R alpha cDNA encodes a 272 amino acid residue precursor Type I membrane protein with a 21 residue signal peptide, a 219 residue extracellular region, a 19 residue transmembrane region and a 13 residue cytoplasmic domain. IL-2 R alpha lacks structural features characteristic of members of the cytokine receptor superfamily. By itself, IL-2 R alpha binds IL-2 with low affinity. However, when IL-2 R alpha is associated with the IL-2 receptor beta and gamma chains, a high affinity heterotrimeric receptor complex that transduces IL-2 signals is formed. Soluble forms of many cytokine receptors have been reported, and a soluble form of IL-2 R alpha (IL-2 sR alpha ) appears in serum, concomitant with its increased expression on cells. The function of the soluble IL-2 R alpha is unclear. Increased levels of IL-2 sR alpha in biological fluids reportedly correlate with increased T and B cell activation and immune system activation. Increased serum concentration of IL-2 sR alpha has been observed in patients with a variety of inflammatory conditions and in the course of some leukemias and lymphomas.
  • Long Name:
    Interleukin 2 Receptor alpha
  • Alternate Names:
    CD25; IL-2 R alpha; IL2RA; CD25; CD25 antigen; IDDM10; IL-2 receptor subunit alpha; IL2R; IL-2R subunit alpha; IL-2-RA; IL2-RA; interleukin 2 receptor, alpha; interleukin-2 receptor subunit alpha; p55; TAC antigen; TCGFR
Related Research Areas

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

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Sample Type
  1. Qualitatively different T cell phenotypic responses to IL-2 versus IL-15 are unified by identical dependences on receptor signal strength and duration.
    Authors: Arneja A, Johnson H, Gabrovsek L, Lauffenburger D, White F
    J Immunol, 2014;192(1):123-35.
    Species: Human
    Sample Type: whole cells
    Application: Flow Cytometry,
  2. VEGFR2 is selectively expressed by FOXP3high CD4+ Treg.
    Authors: Suzuki H, Onishi H, Wada J, Yamasaki A, Tanaka H, Nakano K, Morisaki T, Katano M
    Eur. J. Immunol., 2010;40(1):197-203.
    Species: Human
    Sample Type: Whole Cells
    Application: Flow Cytometry,
  3. Cutaneous lymphocyte-associated antigen (CLA) T cells up-regulate P-selectin ligand expression upon their activation.
    Authors: Ni Z, Walcheck B
    Clin. Immunol., 2009;133(2):257-64.
    Species: Human
    Sample Type: Whole Cells
    Application: Flow Cytometry,
  4. Histone deacetylase inhibitors suppress natural killer cell cytolytic activity.
    Authors: Ogbomo H, Michaelis M, Kreuter J, Doerr HW, Cinatl J
    FEBS Lett., 2007;581(7):1317-22.
    Species: Human
    Sample Type: Whole Cells
    Application: Flow Cytometry,
  5. Long-lasting inhibitory effects of fetal liver mesenchymal stem cells on T-lymphocyte proliferation.
    Authors: Giuliani M, Fleury M, Vernochet A, Ketroussi F, Clay D, Azzarone B, Lataillade JJ, Durrbach A
    Species: Human
    Sample Type: Whole Cells
    Application: Flow Cytometry,
Isotype Controls
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Ctrl IC003P 9
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Staining Kits and Reagents
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Flow FC001 2
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Flow FC003 1
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Flow FC002 1
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