Human CD25/IL-2 R alpha Antibody

(4 citations)   
  • Species Reactivity
    Human
  • Specificity
    Detects human CD25/IL-2 R alpha in direct ELISAs and Western blots. In direct ELISAs, less than 15% cross-reactivity with recombinant human (rh) IL‑2 sR gamma is observed, less than 5% cross-reactivity with rhIL-6 sR is observed, and less than 1% cross-reactivity with rhIL-1 sRII and rhIL-2 sR beta is observed. In direct ELISAs, less than 5% cross-reactivity with recombinant mouse IL-2 R alpha is observed.
  • Source
    Polyclonal Goat IgG
  • Purification
    Antigen Affinity-purified
  • Immunogen
    S. frugiperda insect ovarian cell line Sf 21-derived recombinant human CD25/IL-2 R alpha
    Glu22-Cys213
    Accession # P01589
  • Formulation
    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.
  • Endotoxin Level
    <0.10 EU per 1 μg of the antibody by the LAL method.
  • Label
    Unconjugated
Applications
  •  
    Recommended
    Concentration
    Sample
  • Western Blot
    0.1 µg/mL
    Recombinant Human CD25/IL‑2 R alpha (Catalog # 223-2A)
  • Flow Cytometry
    2.5 µg/106 cells
    Human whole blood lymphocytes
  • Neutralization
    Measured by its ability to neutralize IL‑2-induced proliferation in the N1186 human T cell line. The Neutralization Dose (ND50) is typically 0.2-1 µg/mL in the presence of 1 ng/mL Recombinant Human IL‑2.
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
Cell Proliferation Induced by IL‑2 and Neutralization by Human CD25/IL‑2 R alpha Antibody. Recombinant Human IL‑2 (Catalog # 202-IL) stimulates proliferation in the N1186 human T cell line in a dose-dependent manner (orange line). Proliferation elicited by Recombinant Human IL‑2 (1 ng/mL) is neutralized (green line) by increasing concentrations of Goat Anti-Human CD25/IL‑2 R alpha Antigen Affinity-purified Polyclonal Antibody (Catalog # AF-223-NA). The ND50 is typically 0.2‑1 µg/mL.
Preparation and Storage
  • Reconstitution
    Reconstitute at 0.2 mg/mL in sterile PBS.
  • Shipping
    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.
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
  • Entrez Gene IDs:
    3559 (Human); 16184 (Mouse); 25704 (Rat); 403870 (Canine)
  • Alternate Names:
    CD25 antigen; CD25; CD25/IL-2 R alpha; IDDM10; IL-2 R alpha; IL-2 receptor subunit alpha; IL2R alpha; IL-2R subunit alpha; IL2R; IL2RA; IL-2Ra; IL-2-RA; IL2-RA; interleukin 2 receptor, alpha; interleukin-2 receptor subunit alpha; p55; TAC antigen; TCGFR
Related Research Areas
Citations:

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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  1. Late expression of granulysin by microbicidal CD4+ T cells requires PI3K- and STAT5-dependent expression of IL-2Rbeta that is defective in HIV-infected patients.
    Authors: Zheng CF, Jones GJ, Shi M, Wiseman JC, Marr KJ, Berenger BM, Huston SM, Gill MJ, Krensky AM, Kubes P, Mody CH
    J. Immunol., 2008;180(11):7221-9.
    Species: Human
    Sample Type: Cell Lysates
    Application: WB
  2. Identification of their epitope reveals the structural basis for the mechanism of action of the immunosuppressive antibodies basiliximab and daclizumab.
    Authors: Binder M, Vogtle FN, Michelfelder S, Muller F, Illerhaus G, Sundararajan S, Mertelsmann R, Trepel M
    Cancer Res., 2007;67(8):3518-23.
    Species: Human
    Sample Type: Whole Cells
    Application: Flow
  3. Interleukin-2alpha receptor in membrane lipid rafts.
    Authors: Li QR, Ma J, Wang H, Li JS
    Transplant. Proc., 2005;37(5):2395-7.
    Species: Human
    Sample Type: Cell Lysates
    Application: WB
  4. Intracellular trafficking of Gag and Env proteins and their interactions modulate pseudotyping of retroviruses.
    Authors: Sandrin V, Muriaux D, Darlix JL, Cosset FL
    J. Virol., 2004;78(13):7153-64.
    Species: Human
    Sample Type: Cell Lysates
    Application: WB
Isotype Controls
Description Application Cat# Citations Images  

Normal Goat IgG Control

Ctrl AB-108-C 138  
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Molecular Weight Markers
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Full-Range Molecular Weight Marker, Biotinylated

MW001
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Secondary Antibodies
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Goat IgG Horseradish Peroxidase-conjugated Antibody

WB, Simple Western HAF109 13  
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Goat IgG Horseradish Peroxidase-conjugated Antibody

WB HAF017 11  
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Donkey Anti-Goat IgG NorthernLights™ NL557-conjugated Antibody

Flow, IHC, ICC NL001 6
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Goat IgG (H+L) PE-conjugated Antibody

Flow F0107 2  
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Goat IgG Horseradish Peroxidase-conjugated Antibody

WB HAF019 4  
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Goat IgG (H+L) APC-conjugated Antibody

Flow F0108 3  
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Donkey Anti-Goat IgG NorthernLights™ NL493-conjugated Antibody

Flow, IHC, ICC NL003 4
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Donkey Anti-Goat IgG Antibody

WB AF109 5
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Donkey Anti-Goat IgG Biotinylated Antibody

WB BAF109 3
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Donkey Anti-Goat IgG NorthernLights™ NL637-conjugated Antibody

Flow, IHC, ICC NL002
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Goat IgG (H+L) Fluorescein-conjugated Antibody

Flow F0109 2  
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Goat IgG VisUCyte HRP Polymer

IHC VC004  
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Chicken Anti-Goat IgG Biotinylated Antibody

WB BAF019
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Rabbit Anti-Goat IgG Biotinylated Antibody

WB BAF017
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Rabbit Anti-Goat IgG (H+L) Affinity Purified PAb, X Absorbed

WB, ELISA R-401-C-ABS
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Donkey Anti-Goat IgG (H+L) PerCP-conjugated Antibody

Flow F0124
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