Recombinant Human CD25/IL-2R alpha Protein

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Product Details

Summary
Reactivity HuSpecies Glossary
Applications Bioactivity

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Recombinant Human CD25/IL-2R alpha Protein Summary

Details of Functionality
Measured by its ability to inhibit the IL-2-dependent proliferation of MO7e human megakaryocytic leukemic cells. Avanzi, G. et al. (1988) Br. J. Haematol. 69:359. The ED50 for this effect is 0.15‑0.75 µg/mL in the presence of 30 ng/mL of recombinant human IL-2.
Source
Mouse myeloma cell line, NS0-derived human CD25/IL-2 R alpha protein
Glu22-Cys213
Accession #
N-terminal Sequence
Glu22
Protein/Peptide Type
Recombinant Proteins
Gene
IL2RA
Purity
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain
Endotoxin Note
<0.10 EU per 1 μg of the protein by the LAL method.

Applications/Dilutions

Theoretical MW
22 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
SDS-PAGE
36 kDa, reducing conditions
Publications
Read Publications using
223-2A in the following applications:

Packaging, Storage & Formulations

Storage
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Buffer
Lyophilized from a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Purity
>97%, by SDS-PAGE under reducing conditions and visualized by silver stain
Reconstitution Instructions
Reconstitute at 10 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Recombinant Human CD25/IL-2R alpha Protein

  • CD25 antigen
  • CD25
  • IDDM10
  • IL-2 R alpha
  • IL-2 receptor subunit alpha
  • IL2R alpha
  • IL-2R subunit alpha
  • IL2R
  • IL2RA
  • IL-2Ra
  • IL-2-RA
  • IL2-RA
  • interleukin 2 receptor, alpha
  • interleukin-2 receptor subunit alpha
  • p55
  • TAC antigen
  • TCGFR

Background

Human IL-2 receptor alpha (IL-2 R alpha ), also known as Tac antigen and as CD25, was initially identified as a 55 kDa membrane glycoprotein that is capable of binding IL‑2. The IL-2 R alpha cDNA encodes a 272 amino acid residue precursor Type I membrane protein with a 21 residue signal peptide, a 219 residue extracellular region, a 19 residue transmembrane region and a 13 residue cytoplasmic domain. IL-2 R alpha lacks structural features characteristic of members of the cytokine receptor superfamily. By itself, IL-2 R alpha binds IL-2 with low affinity. However, when IL-2 R alpha is associated with the IL-2 receptor beta and gamma chains, a high affinity heterotrimeric receptor complex that transduces IL-2 signals is formed.

Soluble forms of many cytokine receptors have been reported, and a soluble form of IL-2 R alpha (IL‑2 sR alpha ) appears in serum, concomitant with its increased expression on cells. The function of the soluble IL-2 R alpha is unclear. Increased levels of IL‑2 sR alpha in biological fluids reportedly correlate with increased T and B cell activation and immune system activation. Increased serum concentration of IL-2 sR alpha has been observed in patients with a variety of inflammatory conditions and in the course of some leukemias and lymphomas.

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Publications for CD25/IL-2R alpha (223-2A)(2)

We have publications tested in 1 confirmed species: N/A.

We have publications tested in 2 applications: Bioassay, ELISA (Standard).


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(1)
ELISA (Standard)
(1)
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(1)
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Bioinformatics

Gene Symbol IL2RA
Uniprot