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Manufactured by BioVendor

sInterleukin-2 Receptor α Human CHO cells

  • Regulatory status:RUO
  • Type:Recombinant protein
  • Source:CHO cells
  • Other names:IL-2R, Interleukin-2 receptor alpha, CD25 antigen
  • Species:Human
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Cat. No. Size Price

RBG10002S0025 25 µg
RBG10002S0100 100 µg
RBG10002S1000 1.0 mg
PubMed Product Details
Technical Data


Recombinant protein


The IL-2 receptor system consists of three non-covalently linked subunits termed IL-2Rα, IL-2Rβ, and IL-2Rγ. The IL-2Rα is a type I transmembrane protein consisting of a 219 amino acid extracellular domain, a 19 amino acid transmembrane domain and a 13 amino acid intracellular domain, which is not involved in the transduction of IL-2 signals. Proteolytic processing of IL-2Rα releases the entire extracellular domain of IL-2Rα, thereby generating a 219 amino acid soluble protein called soluble IL-2Rα (sIL-2Rα). The homodimeric form binds IL-2 (KD=10mM) and facilitates IL-2 signaling. The secreted sIL-2Rα is expressed on leukemia cells, lymphoma cells, and newly activated T and B cells, as well as on approximately 10% of NK cells.-- Recombinant Human sIL-2 Receptor α is a 24.8 kDa protein containing 219 amino acid residues consisting of only the extracellular domain of IL-2Rα. As a result of glycosylation, Recombinant Human sIL-2 Receptor α migrates with an apparent molecular mass of approximately 40-50 kDa by SDS-PAGE gel, under reducing and non-reducing conditions.

Amino Acid Sequence



CHO cells


≥ 98% by SDS-PAGE gel and HPLC analyses.

Biological Activity

Determined by its ability to increase the proliferation effect of IL-2 in mouse CTLL-2 cells. In the presence of 1 ng/ml of recombinant IL-2, the expected-ED50-for this effect is between 0.5-1.5 μg/ml.


< 1.0 EU/μg


Sterile filtered through a 0.2 micron filter. Lyophilized from 20mM Sodium Citrate, pH 3.0.


Centrifuge vial prior to opening. Reconstitute in water to 0.1-1.0 mg/ml. Do not vortex. Store at 2°C to 8°C for 1 week, or prepare for extended storage.


This product is intended for research use only.


Research topic

Cytokines and chemokines and related molecules, Oncology, COVID-19


The receptor of the cytokine IL-2 plays a crucial role in the regulation of the immune response. Binding of IL-2 to its receptor (IL-2R) on the surface of T-lymphocytes triggers a series of intracellular signaling events that result in the activation and proliferation of resting T cells and in the generation of helper, suppressor and cytotoxic T cells, which mediate immune reactions. sIL-2R is a marker for T cell activation. It can be an indicator of a wide spectrum of disorders involving immune activation. IL2R can be found at significantly elevated levels in a broad range of disorders such as tumor diseases, autoimmune diseases (e.g. sarcoidosis), organ rejection and various infections.

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