Human embryonic kidney cell, HEK293-derived cynomolgus monkey CD25/IL-2R alpha protein Glu22-Arg213, with a C-terminal 6-His tag
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
<0.10 EU per 1 μg of the protein by the LAL method.
N-terminal sequence Analysis
Predicted Molecular Mass
40-45 kDa, under reducing conditions.
Measured by its ability to inhibit the IL-2-dependent proliferation of MO7e human megakaryocytic leukemic cells. The ED50 for this effect is 0.20-1.60 μg/mL.
Recombinant Cynomolgus CD25/IL-2R alpha His-tag Protein, CF Scientific Data Examples
Recombinant Cynomolgus Monkey CD25/IL-2R alpha His-tag Protein Bioactivity.
Recombinant Cynomolgus Monkey CD25/IL-2R alpha His-tag (Catalog # 10716-RL) inhibits the IL-2 dependent proliferation of MO7e human megakaryocytic leukemic cells. The ED50 for this effect is 0.20-1.60 μg/mL.
Recombinant Cynomolgus Monkey CD25/IL-2R alpha His-tag Protein SDS-PAGE.
2 μg/lane of Recombinant Cynomolgus Monkey CD25/IL-2R alpha His-tag (Catalog # 10716-CV) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 40-45 kDa and 35- 40 kDa, repsectively.
Formulation, Preparation and Storage
What does CF mean?
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our
Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant
protein to be stored at a more dilute concentration.
The carrier free version does not contain BSA.
What formulation is right for me?
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or
as an ELISA standard.
In contrast, the carrier free protein is recommended for applications, in which the presence of BSA
Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitute at 500 μg/mL in PBS.
The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & 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.
Background: CD25/IL-2R alpha
IL-2 receptor alpha (IL-2R alpha), also known as CD25, is a 55 kDa type I membrane glycoprotein that belongs to the family of cytokine receptors that utilize the common gamma chain subunit (gamma c). Cynomolgus monkey IL-2R alpha cDNA encodes a 213 amino acid (aa) precursor with a 21 aa signal peptide and a 192 aa extracellular region. The ECD of cynomolgus monkey IL-2R alpha shares a 91.7% amino acid sequence identity with the ECD of huma IL-2R alpha. IL‑2R alpha is primarily expressed on activated T cells and on regulatory T cells (Treg) (1-3). IL-2R beta (CD122) and gamma c (IL-2R gamma /CD132) dimerize to form a constitutively expressed intermediate affinity IL-2 receptor (4, 5). By itself, IL-2R alpha binds IL-2 with low affinity. IL-2R alpha makes no contacts with IL-2R beta or gamma c, and only minor changes are observed in the IL-2 structure in response to receptor binding. These findings support the principal role of IL-2R alpha to deliver IL-2 to the signaling complex and act as regulator of signal transduction (6, 7). A soluble form of IL‑2R alpha can be generated by proteolytic cleavage of the cell surface receptor, rendering the T cell unresponsive to IL-2 (8, 9). Increased serum levels of soluble IL‑2R alpha are found in some cancers and immune disorders (10). IL-2R alpha is required for activation induced cell death (AICD) of naive T cells, a mechanism responsible for deleting autoreactive T cell clones (11, 12). IL-2R alpha is also required for the development of CD4+CD25+ Treg which suppresses autoreactive CD4+ T cells, thereby contributing to peripheral T cell homeostasis (11‑13). Drug targeting of IL-2R alpha has been indicated to deplete Tregs and induce antitumor immunity in various syngeneic tumors (14, 15).
Minami, Y. et al. (1993) Annu. Rev. Immunol. 11:245.
Kovanen, P.E. and Leonard, W.J. (2004) Immunol. Rev. 202:67.
Bluestone, J.A. and Tang, Q. (2005) Curr. Opin. Immunol. 17:638.
Hatakeyama, M. et al. (1989) Science 244:551.
Takeshita, T. et al. (1992) Science 257:379.
Stauber, D. et al. (2006) Proc. Natl. Acad. Sci. U.S.A. 103:2788.
Wang, X. et al. (2005) Science 310:1159.
Wagner, D.K. et al. (1986) J. Immunol. 137:592.
Schulz, O. et al. (1998) J. Exp. Med. 187:271.
Witkowska, A.M. (2005) Mediat. Inflamm. 2005:121.
Willerford, D.M. et al. (1995) Immunity 3:521.
Van Parijs, L. et al. (1997) J. Immunol. 158:3738.
Almeida, A.R.M. et al. (2002) J. Immunol. 169:4850.
Zammarchi, F. et al. (2020) J. Immunother Cancer. 8:e000860.
Maruoka, A.F. et al. (2020) J. Immunol. Res. 8:345.
Which Brands are Currently Available on bio‑techne.com? R&D Systems, Tocris Bioscience and ProteinSimple branded products are available to purchase through bio‑techne.com. ProteinSimple branded instruments are available to quote. ACD branded products will be available on bio‑techne.com in the near future. Novus Biologicals branded products are not currently available on bio‑techne.com and can be found at novusbio.com.
Setting the standard in quality research reagents for over 30 years
A trusted leader in quality life science reagents
Your trusted supplier for innovative and high performance life science reagents
Proprietary systems and consumables for simpler, more quantitative and affordable protein analysis
Proprietary RNAscope® technology capable of detecting and quantifying RNA biomarkers in situ at single molecule sensitivity
A world leader in developing liquid biopsy based diagnostics