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.
Monoclonal Mouse IgG2A Clone # 24212
Protein A or G purified from hybridoma culture supernatant
S. frugiperda insect ovarian cell line Sf 21-derived recombinant human CD25/IL-2 R alpha
Accession # P01589
Supplied in a saline solution containing BSA and Sodium Azide.
10 µL/106 cells
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.
Detection of 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 PE‑conjugated Monoclonal Antibody (Catalog # FAB3791P) and either (A) Mouse Anti-Human CD25/IL-2 R alpha APC‑conjugated Monoclonal Antibody (Catalog # FAB1020A) or (B) Mouse IgG2A Allophycocyanin Isotype Control (Catalog # IC003A). View our protocol for Staining Membrane-associated Proteins.
Preparation and Storage
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.
Interleukin 2 Receptor alpha
Entrez Gene IDs:
3559 (Human); 16184 (Mouse); 25704 (Rat); 403870 (Canine)
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