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Your Position: Home > All Other Proteins > IL-2 R alpha > Human IL2RA /CD25 Protein,C-Fc Tag

Human IL-2 R alpha / CD25 Protein, Fc Tag

  • Synonym
    IL2RA,CD25,p55,IL2-RA,IL-2-RA
  • Source
    Human IL-2 R alpha, Fc Tag (ILA-H5251) is expressed from human 293 cells (HEK293). It contains AA Glu 22 - Cys 213 (Accession # NP_000408).
    Predicted N-terminus: Glu 22
  • Molecular Characterization
    Online(Glu 22 - Cys 213) NP_000408

    This protein carries a human IgG1 Fc tag at the C-terminus.

    The protein has a calculated MW of 48.4 Kda. The protein migrates as 60-66 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

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

    >95% as determined by SDS-PAGE.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in Tris with Glycine, Arginine and NaCl, pH7.5. Normally trehalose is added as protectant before lyophilization.

    Contact us for customized product form or formulation.

  • 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.

  • Storage

    For long term storage, the product should be stored at lyophilized state at -20°C or lower.

    Please avoid repeated freeze-thaw cycles.

    No activity loss was observed after storage at:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
SDS-PAGE
Human IL-2 R alpha, Fc Tag (Cat. No. ILA-H5251) SDS-PAGE gel

Human IL-2 R alpha, Fc Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 95%.

Bioactivity-ELISA
Human IL-2 R alpha, Fc TagHuman IL-2 R alpha, Fc Tag (Cat. No. ILA-H5251) ELISA bioactivity

Immobilized Human IL-2 R alpha, Fc Tag (Cat. No. ILA-H5251) at 2μg/mL (100 μL/well) can bind Human IL-2, Tag Free (Cat. No. IL2-H4113) with a linear range of 0.2-1.56 ng/mL (QC tested).

Bioactivity-BLI
Human_FcRn_Heterodimer_Protein_Bli

Loaded Human IL-2 R alpha, Fc Tag (Cat. No. ILA-H5251) on Protein A Biosensor, can bind Human IL-2, Tag Free (Cat. No. IL2-H4113) with an affinity constant of 43.2 nM as determined in BLI assay (ForteBio Octet Red96e) (Routinely tested).

  • Background
    Interleukin-2 receptor subunit alpha (IL2RA) is also known as IL-2R subunit alpha, IL-2-RA, IL2-RA, TAC antigen, p55, CD antigen CD25, is a type I transmembrane glycoprotein. IL2RA is expressed on activated T cells and regulatory T cells, and is capable of binding IL2 with low affinity by itself. However, a ligand-induced high affinity heterotrimeric receptor complex is produced when IL2RA is associated non-covelently with the IL2 receptor beta and gamma chain, and subsequently initiates the intacellular signal pathways such as MAPK or JAK/STAT. On dendritic cells (DC), CD25 has been previously regarded as an activation marker, while both murine and human DC can express CD25, they do not express the beta-chain of the IL-2 receptor, which is indispensable for the execution of IL-2 signaling.
  • References
  • Please contact us via TechSupport@acrobiosystems.com if you have any question on this product.

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