Human CD25/IL-2R alpha Antibody

Name: Human CD25/IL-2R alpha Antibody
Brand: R&D Systems
SKU: AF-223-SP
Rating: 4.5 (2 reviews)

AF-223-NA 4 Citations 2 Reviews Datasheet / COA / SDS

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AF-223-NA
AF-223-SP

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Citations (4)

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Summary Data Examples Preparation and Storage Reconstitution Calculator Background Product Datasheets Related Research Areas

Human CD25/IL-2R alpha Antibody Summary

Species Reactivity

Human

Specificity

Detects human CD25/IL‑2 R alpha in direct ELISAs and Western blots. In direct ELISAs, less than 5% cross-reactivity with recombinant mouse IL‑2 R alpha and recombinant rat 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

1 µg/mL

See below

Flow Cytometry

2.5 µg/10⁶ cells

Human whole blood lymphocytes

CyTOF-ready

Ready to be labeled using established conjugation methods. No BSA or other carrier proteins that could interfere with conjugation.

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

Western Blot

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Detection of Human CD25/IL-2R alpha by Western Blot. Western blot shows lysates of HDLM-2 human Hodgkin's lymphoma cell line and PC-3 human prostate cancer cell line (negative control). PVDF membrane was probed with 1 µg/mL of Goat Anti-Human CD25/IL-2R alpha Antigen Affinity-purified Polyclonal Antibody (Catalog # AF-223-NA) followed by HRP-conjugated Anti-Goat IgG Secondary Antibody (Catalog # HAF017). A specific band was detected for CD25/IL-2R alpha at approximately 60 kDa (as indicated). GAPDH (Catalog # AF5718) is shown as a loading control.This experiment was conducted under reducing conditions and using Immunoblot Buffer Group 1.

Neutralization

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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 Ra Antigen Affinity-purified Polyclonal Antibody (Catalog # AF-223-NA). The ND₅₀is typically 0.2-1 µg/mL.

Reconstitution Calculator

Preparation and Storage

Reconstitution

Reconstitute at 0.2 mg/mL in sterile PBS.

Reconstitution Buffer Available

Reconstitution Buffer 1 (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-2R 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); 102123605 (Cynomolgus Monkey)

Alternate Names

CD25 antigen; CD25; 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

Product Datasheets

Product Datasheet

COA

SDS

Related Research Areas

Citations for Human CD25/IL-2R alpha Antibody

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.

4 Citations: Showing 1 - 4
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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 Types: Cell Lysates
Applications: Western Blot
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 Types: Whole Cells
Applications: Flow Cytometry
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 Types: Cell Lysates
Applications: Western Blot
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 Types: Cell Lysates
Applications: Western Blot