Recombinant CD25 antibody

Catalog No. ABIN7543079

This Rabbit Chimeric antibody specifically detects CD25 in FACS, ELISA, IP and IF. It exhibits reactivity toward Human.

Quick Overview for Recombinant CD25 antibody (ABIN7543079)

Target: CD25 (IL2RA) (Interleukin 2 Receptor, alpha (IL2RA))

Antibody Type: Recombinant Antibody

Reactivity: Human

Host: Rabbit

Clonality: Chimeric

Conjugate: This CD25 antibody is un-conjugated

Application: Flow Cytometry (FACS), ELISA, Immunoprecipitation (IP), Immunofluorescence (IF)

Clone: 7G7-B6

Product Details anti-CD25 Antibody

Purpose: Anti-CD25 [7G7/B6], Rabbit IgG, kappa

Specificity: This antibody is specific for human interleukin 2 (IL2) receptor alpha (IL2RA), which is expressed by activated T cells. IL2R alpha chains can exist as low-affinity monomers, or can non-covalently associate with IL2R beta chains to form high-affinity dimers.

Characteristics:

Original Species of Ab: Mouse

Original Format of Ab: IgG2a

Purification: Protein A affinity purified

Immunogen: This antibody was raised by injecting mice intraperitoneally and subcutaneously with Hong Kong influenza virus-stimulated PBMC, which express human IL-2 receptor alpha. Immune splenocytes were subsequently fused with SP2/0 cells to produce stable hybridomas.

Isotype: IgG kappa

Application Details

Application Notes: This antibody recognises human IL2RA, as confirmed by immunofluorescence, FACS and immunoprecipitation analysis (Rubin et al, 1985). Sequential immunoprecipitations have shown that 7G7/B6 binds to the same 50-55 kD surface molecule as anti-Tac, a murine mAb specific for the human IL-2 receptor. However, 7G7/B6 does not compete with IL-2 and anti-Tac for binding to IL2R expressed by activated PBMCs, indicating that 7G7/B6 recognises a distinct epitope on IL2R. 7G7/B6, therefore, recognises a different epitope on IL-2Rα to the humanised anti-Tac monoclonal antibody daclizumab (Zhang et al, 2006). Equally, although 7G7/B6 binds to a different epitope on IL2 Rα to IL-2, and is, therefore, unable to block IL-2/IL2 Rα interaction, 7G7/B6 is still able to delay tumour progression and prolong survival in mouse models of adult T-cell leukaemia (ATL) (Phillips et al, 2000), likely by FcR-mediated death by FcRIII-expressing cells. Administration of 7B7/B6 radiolabelled with astatine-211 (211At-7G7/B6) to karpas299 leukaemia-bearing mice significantly increased survival, highlighting the potential therapeutic role for 211At-7G7/B6 in the treatment of patients with CD25-expressing leukaemias (Zhang et al, 2006). Indeed, 211At-7G7/B6 in combination with daclizumab induces significant long-term survival in murine models of adult T-cell leukaemia (Zhang et al, 2006). Additionally, 7G7/B6 armed with Yttrium-90 (90Y) significantly extends the survival of SUDHL-1 lymphoma-bearing mice significantly (Zhang et al, 2009), and presents another option for combination therapy with daclizumab. 7G7/B6 has been used in flow cytometric measurements of energy transfer efficiencies between FITC- and Cy3-conjugated mAbs bound to IL-2Rα, β, and γ subunits on Kit 225 K6 T cells, revealing that IL-2R subunits are preassembled on resting cells (Damjanovich et al, 1997). This antibody has also been used in an ELISA to assess serum levels of IL-2R (Uziel et al, 1994).

Comment:

This chimeric rabbit antibody was made using the variable domain sequences of the original Mouse IgG2a format, for improved compatibility with existing reagents, assays and techniques.

Restrictions: For Research Use only

Handling

Concentration: 1 mg/mL

Buffer: PBS with 0.02 % Proclin 300.

Preservative: ProClin

Precaution of Use: This product contains ProClin: a POISONOUS AND HAZARDOUS SUBSTANCE which should be handled by trained staff only.

Storage: 4 °C,-20 °C

Storage Comment: Store at 4°C for up to 3 months. For longer storage, aliquot and store at -20°C.

Target Details for CD25

Target: CD25 (IL2RA) (Interleukin 2 Receptor, alpha (IL2RA))

Alternative Name: CD25

Background: IL2-RA, Interleukin-2 receptor subunit alpha, IL-2-RA, IL-2R subunit alpha, TAC antigen, p55, Receptor for interleukin-2

UniProt: P01589

Pathways: JAK-STAT Signaling, Growth Factor Binding, Activated T Cell Proliferation