Name : IL-2 R α, His, Human

Product Concentration :

Background :
Interleukin-2 receptor (IL-2R) is a heterotrimeric protein expressed on the surface of certain immune cells, such as lymphocytes, that binds and responds to the cytokine IL-2. The IL-2R is made up of 3 subunits – alpha (α), beta (β) and gamma (γ). The α and β chains are involved in binding IL-2, while signal transduction following cytokine interaction is carried out by the γ-chain, along with the β subunit. The β and γ chains of the IL-2R are members of the type I cytokine receptor family. IL-2R has a high binding affinity to IL-2 and is expressed by antigen-activated T lymphocytes (T cells). IL-2 Rα is also known as CD25, p55, and Tac (activated T cell) antigen.

Biological Activity :
Determined by its ability to increase the proliferation effect of IL-2 in murine CTLL-2 cells. In the presence of 1.0 ng/ml of recombinant IL-2, ED50 for this effect is

expression system :
HEK 293

Tag :
Poly-His IL-2 Rα (Glu22-Cys213)Accession # P01589 N-term C-term

Protein Accession No. :

Synonyms :
IL2RA; soluble IL-2 receptor; TAC-antigen; CD25 antigen; Tac antigen; IL-2Rα

Molecular Weight :
~42 kDa, on SDS-PAGE under reducing conditions.

Purity :
> 95% as analyzed by SDS-PAGE> 95% as analyzed by HPLC

Product Concentration :
Lyophilized after extensive dialysis against PBS.

Storage and Stability :
Upon receiving, this product remains stable for up to 6 months at lower than -70°C. Upon reconstitution, the product should be stable for up to 1 week at 4°C or up to 3 months at -20°C. For long term storage it is recommended that a carrier protein (example 0.1% BSA) be added. Avoid repeated freeze-thaw cycles.

MedChemExpress (MCE) recombinant proteins include: cytokines, enzymes, growth factors, hormones, receptors, transcription factors, antibody fragments, etc. They are often essential for supporting cell growth, stimulating cell signaling pathways, triggering or inhibiting cell differentiation; and are useful tools for elucidating protein structure and function, understanding disease onset and progression, and validating pharmaceutical targets. At MedChemExpress (MCE), we strive to provide products with only the highest quality. Protein identity, purity and biological activity are assured by our robust quality control and assurance procedures.
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