Skip to main content Skip to navigation
RB545 Mouse Anti-Human CD25 (IL-2 Receptor α)
RB545 Mouse Anti-Human CD25 (IL-2 Receptor α)
Multicolor flow cytometric analysis of CD25 (IL-2 Receptor α) expression on unstimulated and stimulated Human peripheral blood lymphocytes.    Left and Middle Plots: Human whole blood was stained with APC Mouse Anti-Human CD4 antibody (Cat. No. 561841/555349/561840) and with either BD Horizon™ RB545 Mouse IgG1, κ Isotype Control (Cat. No. 569284; Left Plot) or BD Horizon™ RB545 Mouse Anti-Human CD25 (IL-2 Receptor α) antibody (Cat. No. 569267/569268; Middle Plot). Erythrocytes were lysed with BD FACS Lysing™ Solution (Cat. No. 349202). The two-parameter pseudocolor density plot showing the correlated expression of CD25 (IL-2 Receptor α) [or Ig Isotype control staining] versus CD4 was derived from gated events with the forward and side light-scatter characteristics of intact lymphocytes.    Right Plot: Human peripheral blood mononuclear cells were stimulated for 3 days with Phytohemagglutinin (PHA). The cells were stained with either BD Horizon™ RB545 Mouse IgG1, κ Isotype Control (Cat No. 569284, dashed line histogram) or BD Horizon™ RB545 Mouse Anti-Human CD25 (IL-2 Receptor α) antibody (Cat No. 569267/569268, solid line histogram). The fluorescence histogram showing CD25 (IL-2 Receptor α) expression (or Ig Isotype control staining) was derived from gated events with the forward and side light-scatter characteristics of viable lymphoblasts.    Samples were acquired on the BD FACSymphony™ A5 SE Cell Analyzer and spectrally unmixed using FlowJo™ v10.8 software.
Multicolor flow cytometric analysis of CD25 (IL-2 Receptor α) expression on unstimulated and stimulated Human peripheral blood lymphocytes.    Left and Middle Plots: Human whole blood was stained with APC Mouse Anti-Human CD4 antibody (Cat. No. 561841/555349/561840) and with either BD Horizon™ RB545 Mouse IgG1, κ Isotype Control (Cat. No. 569284; Left Plot) or BD Horizon™ RB545 Mouse Anti-Human CD25 (IL-2 Receptor α) antibody (Cat. No. 569267/569268; Middle Plot). Erythrocytes were lysed with BD FACS Lysing™ Solution (Cat. No. 349202). The two-parameter pseudocolor density plot showing the correlated expression of CD25 (IL-2 Receptor α) [or Ig Isotype control staining] versus CD4 was derived from gated events with the forward and side light-scatter characteristics of intact lymphocytes.    Right Plot: Human peripheral blood mononuclear cells were stimulated for 3 days with Phytohemagglutinin (PHA). The cells were stained with either BD Horizon™ RB545 Mouse IgG1, κ Isotype Control (Cat No. 569284, dashed line histogram) or BD Horizon™ RB545 Mouse Anti-Human CD25 (IL-2 Receptor α) antibody (Cat No. 569267/569268, solid line histogram). The fluorescence histogram showing CD25 (IL-2 Receptor α) expression (or Ig Isotype control staining) was derived from gated events with the forward and side light-scatter characteristics of viable lymphoblasts.    Samples were acquired on the BD FACSymphony™ A5 SE Cell Analyzer and spectrally unmixed using FlowJo™ v10.8 software.
Product Details
Down Arrow Up Arrow


BD Horizon™
IL-2R; IL2RA; IL-2Rα; TCGFR; TAC antigen; p55
Human (QC Testing)
Mouse BALB/c IgG1, κ
Human Phytohemagglutinin-activated T Cells
Flow cytometry (Routinely Tested)
5 µl/test
III A769,T153; IV A8
3559
Aqueous buffered solution containing ≤0.09% sodium azide.
RUO


Preparation And Storage

Store undiluted at 4°C and protected from prolonged exposure to light. Do not freeze. The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography. The antibody was conjugated to the dye under optimum conditions and unreacted dye was removed.

Recommended Assay Procedures

BD® CompBeads can be used as surrogates to assess fluorescence spillover (compensation). When fluorochrome conjugated antibodies are bound to BD® CompBeads, they have spectral properties very similar to cells. However, for some fluorochromes there can be small differences in spectral emissions compared to cells, resulting in spillover values that differ when compared to biological controls. It is strongly recommended that when using a reagent for the first time, users compare the spillover on cells and BD® CompBeads to ensure that BD® CompBeads are appropriate for your specific cellular application.

Product Notices

  1. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
  2. This reagent has been pre-diluted for use at the recommended Volume per Test. We typically use 1 × 10^6 cells in a 100-µl experimental sample (a test).
  3. An isotype control should be used at the same concentration as the antibody of interest.
  4. Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
  5. Please observe the following precautions: Absorption of visible light can significantly alter the energy transfer occurring in any tandem fluorochrome conjugate; therefore, we recommend that special precautions be taken (such as wrapping vials, tubes, or racks in aluminum foil) to prevent exposure of conjugated reagents, including cells stained with those reagents, to room illumination.
  6. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
  7. Human donor specific background has been observed in relation to the presence of anti-polyethylene glycol (PEG) antibodies, developed as a result of certain vaccines containing PEG, including some COVID-19 vaccines. We recommend use of BD Horizon Brilliant™ Stain Buffer in your experiments to help mitigate potential background. For more information visit https://www.bdbiosciences.com/en-us/support/product-notices.
  8. Please refer to http://regdocs.bd.com to access safety data sheets (SDS).
  9. For U.S. patents that may apply, see bd.com/patents.
569267 Rev. 1
Antibody Details
Down Arrow Up Arrow
2A3

The 2A3 monoclonal antibody specifically binds to human CD25, the low-affinity alpha subunit of the Interleukin-2 Receptor (IL- 2Rα). CD25 associates with CD122 (IL-2Rβ chain) and CD132 (common γ chain or γc) to form the high-affinity signal-transducing IL-2R complex. CD25 is expressed by subsets of thymocytes and peripheral blood lymphocytes including CD4+CD25+ regulatory T cells and memory T cells. CD25 antigen density increases on activated T cells including phytohemagglutinin (PHA)-, concanavalin A (Con A)-, and CD3-activated T lymphocytes. High levels of CD25 can be expressed by T lymphocytes from mixed lymphocyte cultures and by human T-lymphocyte leukemia virus (HTLV)-infected T-lymphocyte leukemia lines, for example, HUT-102. CD25 can also be expressed by activated B cells and macrophages. Recombinant IL-2 blocks the binding of the 2A3 antibody to PHA-activated T lymphocytes.

569267 Rev. 1
Format Details
Down Arrow Up Arrow
RB545
The BD Horizon RealBlue™ 545 (RB545) fluorochrome is part of the BD family of blue (488-nm) laser dyes. It is a small organic fluorochrome with an excitation maximum (Ex Max) at 496-nm and an emission maximum (Em Max) at 545-nm. Driven by BD innovation, RB545 can be used on spectral cytometers and is designed to be excited by the blue (488-nm) laser with minimal excitation by the 561-nm yellow-green laser. RB545 has minimal spillover into yellow-green detectors and a brightness level similar to FITC.  Given its unique emission max, on a spectral instrument RB545 can be used simultaneously with FITC and PE to provide an additional color off of the blue laser. Please ensure that your instrument configuration (lasers and optical filters) is appropriate for this dye.
altImg
RB545
Blue 488 nm
496 nm
545 nm
569267 Rev.1
Citations & References
Down Arrow Up Arrow

Development References (15)

  1. Dower SK, Hefeneider SH, Alpert AR, Urdal DL. Quantitative measurement of human interleukin 2 receptor levels with intact and detergent-solubilized human T-cells. Mol Immunol. 1985; 22(8):937-947. (Clone-specific). View Reference
  2. Greene WC, Leonard WJ. The human interleukin-2 receptor. Annu Rev Immunol. 1986; 4:69-95. (Clone-specific). View Reference
  3. Jackson AL, Matsumoto H, Janszen M, Maino V, Blidy A, Shye S. Restricted expression of p55 interleukin 2 receptor (CD25) on normal T cells. Clin Immunol Immunopathol. 1990; 54(1):126-133. (Clone-specific: Flow cytometry). View Reference
  4. Lando Z, Sarin P, Megson M, et al. Association of human T-cell leukaemia/lymphoma virus with the Tac antigen marker for the human T-cell growth factor receptor. Nature. 1983; 305(5936):733-736. (Biology). View Reference
  5. Leonard WJ, Depper JM, Uchiyama T, Smith KA, Waldmann TA, Greene WC. A monoclonal antibody that appears to recognize the receptor for human T-cell growth factor; partial characterization of the receptor. Nature. 1982; 300(5889):267-269. (Biology). View Reference
  6. Lin G-X, Yang X, Hollemweguer E, et al. Cross-reactivity of CD antibodies in eight animal species. In: Mason D. David Mason .. et al., ed. Leucocyte typing VII : white cell differentiation antigens : proceedings of the Seventh International Workshop and Conference held in Harrogate, United Kingdom. Oxford: Oxford University Press; 2002:519-523.
  7. Neubert R, Foerster M, Nogueira AC, Helge H. Cross-reactivity of antihuman monoclonal antibodies with cell surface receptors in the common marmoset.. Life Sci. 1996; 58(4):317-24. (Clone-specific: Flow cytometry). View Reference
  8. Ng WF, Duggan PJ, Ponchel F, et al. Human CD4(+)CD25(+) cells: a naturally occurring population of regulatory T cells. Blood. 2001; 98(9):2736-2744. (Biology). View Reference
  9. Rambaldi A, Young DC, Herrmann F, Cannistra SA, Griffin JD. Interferon-gamma induces expression of the interleukin 2 receptor gene in human monocytes. Eur J Immunol. 1987; 17(1):153-156. (Clone-specific). View Reference
  10. Robb RJ, Greene WC, Rusk CM. Low and high affinity cellular receptors for interleukin 2. Implications for the level of Tac antigen. J Exp Med. 1984; 160(4):1126-1146. (Biology). View Reference
  11. Schwarting R, Stein H. Cluster report: CD25. In: Knapp W. W. Knapp .. et al., ed. Leucocyte typing IV : white cell differentiation antigens. Oxford New York: Oxford University Press; 1989:399-403.
  12. Sereti I, Martinez-Wilson H, Metcalf JA, et al. Long-term effects of intermittent interleukin 2 therapy in patients with HIV infection: characterization of a novel subset of CD4(+)/CD25(+) T cells. Blood. 2002; 100(6):2159-2167. (Clone-specific: Flow cytometry). View Reference
  13. Siegel JP, Sharon M, Smith PL, Leonard WJ. The IL-2 receptor beta chain (p70): role in mediating signals for LAK, NK, and proliferative activities. Science. 1987; 238(4823):75-78. (Biology). View Reference
  14. Teshigawara K, Wang HM, Kato K, Smith KA. Interleukin 2 high-affinity receptor expression requires two distinct binding proteins. J Exp Med. 1987; 165(1):223-238. (Biology). View Reference
  15. Urdal DL, March CJ, Gillis S, Larsen A, Dower SK. Purification and chemical characterization of the receptor for interleukin 2 from activated human T lymphocytes and from a human T-cell lymphoma cell line. Proc Natl Acad Sci U S A. 1984; 81(20):6481-6485. (Immunogen: Blocking, Dot Blot, Immunoaffinity chromatography, Inhibition, Radioimmunoassay). View Reference
View All (15) View Less
569267 Rev. 1

Please refer to Support Documents for Quality Certificates


Global - Refer to manufacturer's instructions for use and related User Manuals and Technical data sheets before using this products as described


Comparisons, where applicable, are made against older BD Technology, manual methods or are general performance claims.  Comparisons are not made against non-BD technologies, unless otherwise noted.

For Research Use Only. Not for use in diagnostic or therapeutic procedures.