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APC-R700 Mouse Anti-Human CD25 2A3 RUO

APC-R700 Mouse Anti-Human CD25 

Clone  2A3   (RUO)

  • Brand BD Horizon™
  • Alternative Name IL-2R; IL2RA; IL-2Rα; TCGFR; TAC antigen; p55
  • Vol. Per Test 5 µl
  • Isotype Mouse BALB/c IgG1, κ
  • Reactivity Human (QC Testing) 
  • Application Flow cytometry (Routinely Tested) 
  • Immunogen Human Phytohemagglutinin-activated T Cells
  • Workshop No. III A769,T153; IV A8
  • Entrez Gene ID 3559 
  • Storage Buffer Aqueous buffered solution containing BSA, protein stabilizer, glycerol and ≤0.09% sodium azide.
  • Regulatory Status RUO
Product Details Recommended Assay References

Description

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.

This antibody was conjugated to BD Horizon APC-R700, which has been developed exclusively by BD Biosciences as a better alternative to Alexa Fluor® 700. APC-R700 excites and emits at similar wavelengths to Alexa Fluor® 700 yet exhibits significantly improved brightness. This dye can be excited by the red laser and detected with the same filter set as Alexa Fluor® (eg, 730/45-nm filter).

Format
  • Format APC-R700
  • Excitation Source Red 633 nm
  • Excitation Max 652 nm
  • Emission Max 704 nm

APC-R700 is a tandem fluorochrome that combines APC with R700, a proprietary organic dye. This dye has been developed exclusively by BD Biosciences as a brighter alternative to Alexa Fluor® 700. Due to similar excitation and emission properties, APC-R700 and Alexa Fluor® 700 cannot be used simultaneously.

Other Formats →

Suggested Companion Products

APC-R700 Mouse Anti-Human CD25 2A3 RUO
25 Tests Cat No: 565107

Lysing Solution 10X Concentrate IVD
100 Cat No: 349202

Lysing Buffer RUO
100 mL Cat No: 555899

PE Mouse Anti-Human CD4 RPA-T4 RUO
100 Tests Cat No: 555347

PE Mouse Anti-Human CD4 RPA-T4 RUO
25 Tests Cat No: 561843

PE Mouse Anti-Human CD4 RPA-T4 RUO
500 Tests Cat No: 561844

Stain Buffer (BSA) RUO
500 mL Cat No: 554657

Stain Buffer (FBS) RUO
500 mL Cat No: 554656

Resources & Tools
 Spectrum Viewer  Panel Designer  Spectrum Viewer  Download TDS  Regulatory Document Website
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 with BD Horizon APC-R700 under optimum conditions, and unconjugated antibody and free BD Horizon APC-R700 were removed.

Product Notices

  1. 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).
  2. Please refer to www.bdbiosciences.com/pharmingen/protocols for technical protocols.
  3. Alexa Fluor® is a registered trademark of Molecular Probes, Inc., Eugene, OR.
  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. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
  6. Source of all serum proteins is from USDA inspected abattoirs located in the United States.
  7. An isotype control should be used at the same concentration as the antibody of interest.


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  2. Greene WC, Leonard WJ. The human interleukin-2 receptor. Annu Rev Immunol. 1986; 4:69-95. 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. 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. 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. View reference

  6. 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. View reference

  7. 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. View reference

  8. 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. View reference

  9. 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.

  10. 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. View reference

  11. 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. View reference

  12. 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. View reference

  13. 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. View reference

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