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Biotinylated Human IL-2 R beta/CD122 Protein

Product Info

Recombinant Biotinylated Human IL-2 R beta/CD122 Protein is expressed from Expi293 with His tag and Avi tag at the C-terminal. It contains Ala27-Asp239.[Accession | NP_000869]

Molecular Weight

The protein has a predicted MW of 27.5 kDa. Due to glycosylation, the protein migrates to 40-50 kDa based on Tris-Bis PAGE result.


Less than 1EU per μg by the LAL method.


> 95% as determined by Tris-Bis PAGE
> 95% as determined by HPLC


Lyophilized from 0.22μm filtered solution in PBS (pH 7.4). Normally 5% trehalose is added as protectant before lyophilization.


Centrifuge tubes before opening. Reconstituting to a concentration more than 100 μg/ml is recommended. Dissolve the lyophilized protein in distilled water.


The product should be stored at -70℃ or -20℃.

Assay Data
Tris-Bis PAGE

Biotinylated Human IL-2 R beta on Tris-Bis PAGE under reduced condition. The purity is greater than 95%.


The purity of Biotinylated Human IL-2 R beta is greater than 95% as determined by SEC-HPLC.


IL-2 R beta is a member of the cytokine receptor superfamily. Human IL-2 R beta cDNA encodes a 551 amino acid residue precursor Type I membrane protein with a 26 residue signal peptide, a 214 residue extracellular region, a 25 residue transmembrane region and a 286 residue cytoplasmic domain. Functional IL-2 receptors can exist in two affinity states on cell surfaces, the high affinity complex consisting of heterotrimers of the alpha, beta, and gamma chains, and the intermediate affinity complex comprising heterodimers of the beta and gamma chains.


CD122; IL-15 R beta; IL-2 R beta; IL-2R subunit beta; IL2RB; P70-75; p75; RP5-1170K4.6


(1)Smith K A . The structure of IL2 bound to the three chains of the IL2 receptor and how signaling occurs[J]. Medical Immunology, 2006, 5(1).

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