Recombinant Biotinylated Human IL-2 R beta / CD122 Protein, His,Avitag™, 25 µg

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 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.

Source
Recombinant Biotinylated Human IL-2 R beta, His,Avitag (ILB-H82E3) is expressed from human 293 cells (HEK293). It contains AA Ala 27 - Asp 239 (Accession # P14784-1).
Predicted N-terminus: Ala 27

Molecular Characterization
This protein carries a polyhistidine tag at the C-terminus, followed by an Avi tag (Avitag™).
The protein has a calculated MW of 28.2 kDa. The protein migrates as 35-38 kDa and 42-45 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

Biotinylation
Biotinylation of this product is performed using Avitag™ technology. Briefly, the single lysine residue in the Avitag is enzymatically labeled with biotin.

Biotin:Protein Ratio
Passed as determined by the HABA assay / binding ELISA.

Endotoxin
Less than 1.0 EU per μg by the LAL method.

Purity
>95% purity as determined by SDS-PAGE.

Formulation
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4. Normally trehalose is added as protectant before lyophilization.

Reconstitution
See Certificate of Analysis for details of reconstitution instruction and specific concentration.

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.

Bioactivity
Please refer to product data sheet.

Clinical and Translational Updates

(1) "Phytocannabinoids as Potential Multitargeting Neuroprotectants in Alzheimer's Disease"
Rathod, Agrawal
Curr Drug Res Rev (2023)
(2) "Clinicopathological assessment of PD-1/PD-L1 immune checkpoint expression in desmoid tumors"
Hashimoto, Nishimura, Shinyashiki et al
Eur J Histochem (2023) 67 (2)
(3) "Cytokines and regulatory T cells in ankylosing spondylitis"
Liao, Tsai
Bone Joint Res (2023) 12 (2), 133-137
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