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分子别名（Synonym）
IL2RB,RP5-1170K4.6,CD122,P70-75
表达区间及表达系统（Source）
Human IL-2 R beta, Fc Tag (ILB-H5253) is expressed from human 293 cells (HEK293). It contains AA Ala 27 - Asp 239 (Accession # NP_000869.1).
Predicted N-terminus: Ala 27
Request for sequence
蛋白结构（Molecular Characterization）
This protein carries a human IgG1 Fc tag at the C-terminus.
The protein has a calculated MW of 51.0 kDa. The protein migrates as 60-65 kDa when calibrated against Star Ribbon Pre-stained Protein Marker under reducing (R) condition (SDS-PAGE) due to glycosylation.
内毒素（Endotoxin）
Less than 1.0 EU per μg by the LAL method.
纯度（Purity）
>95% as determined by SDS-PAGE.
制剂（Formulation）
Lyophilized from 0.22 μm filtered solution in 50 mM Tris, 100 mM Glycine, 150 mM NaCl, pH7.5 with trehalose as protectant.
Contact us for customized product form or formulation.
重构方法（Reconstitution）
Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
存储（Storage）
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
产品数据图
电泳（SDS-PAGE）
Human IL-2 R beta, Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95% (With Star Ribbon Pre-stained Protein Marker).
SEC-MALS
The purity of Human IL-2 R beta, Fc Tag (Cat. No. ILB-H5253) is more than 85% and the molecular weight of this protein is around 120-135 kDa verified by SEC-MALS.
Report
活性（Bioactivity）-ELISA
Immobilized Human IL-15, premium grade (Cat. No. IL5-H4117) at 5 μg/mL (100 μL/well) can bind Human IL-2 R beta, Fc Tag (Cat. No. ILB-H5253) with a linear range of 5-156 ng/mL (Routinely tested).
Protocol
Immobilized Biotinylated Human IL-2, His,Avitag (Cat. No. IL2-H82E4) at 1 μg/mL (100 μL/well) on streptavidin (Cat. No. STN-N5116) precoated (0.5 μg/well) plate can bind Human IL-2 R beta, Fc Tag (Cat. No. ILB-H5253) with a linear range of 0.3-2 ng/mL (Routinely tested).
Protocol
活性（Bioactivity）-SPR
Human IL-2 R beta, Fc Tag (Cat. No. ILB-H5253) captured on CM5 chip via anti-human IgG Fc antibody can bind IL-2, Tag Free with an affinity constant of 0.473 μM as determined in a SPR assay (Biacore T200) (QC tested).
Protocol
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背景
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 a cytokine called IL-2. The IL-2R is made up of 3 subunits - α (CD25), β (CD122) and γ (CD132) - non-covalently associating. 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.
CD122 is also known as IL2R beta, is a member of the type I cytokine receptor family. CD122 is the receptor for interleukin-2 and is involved in receptor mediated endocytosis and transduces the mitogenic signals of IL2.
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