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APC Mouse Anti-Human CD25
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IL-2R; IL2RA; IL-2Rα; TCGFR; TAC antigen; p55
Mouse BALB/c IgG1, κ
Human Phytohemagglutinin-activated T Cells
Flow cytometry
12 μg/mL
5 μL
III A769,T153; IV A8
Phosphate buffered saline with gelatin and 0.1% sodium azide.

Preparation and Storage

The monoclonal antibody is supplied as 10 µg purified immunoglobulin in 2.0 mL (5 µg/mL) of PBS. The FITC conjugate is supplied as 20 µg in 2.0 mL (10 µg/mL) of PBS. The PE conjugate is supplied as 3 µg in 1.0 mL (3 µg/mL) of PBS. The PE-Cy7 conjugate is supplied as 6.25 µg in 0.5 mL (12.5 µg/mL) of PBS. The APC conjugate is supplied as 6 µg in 0.5 mL (12 µg/mL) of PBS. PBS contains gelatin and 0.1% sodium azide.

Store vials at 2° to 8°C. Conjugated forms should not be frozen and should be protected from prolonged exposure to light. Each reagent is stable for the period shown on the bottle label when stored as directed.

340939 Rev. 1
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The CD25 antibody, clone 2A3. is derived from the hybridization of NS-1 mouse myeloma cells with spleen cells isolated from BALB/c mice immunized with PHA-activated human T lymphocytes.

The CD25 antibody recognizes a 55-kilodalton (kDa) type I integral membrane glycoprotein. The CD25 antigen is also known as the human low-affinity interleukin-2 receptor α chain (IL-2Rα) and the Tac antigen.

340939 Rev. 1
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Allophycocyanin (APC), is part of the BD family of phycobiliprotein dyes. This fluorochrome is a multimeric fluorescent phycobiliprotein with excitation maximum (Ex Max) of 651 nm and an emission maximum (Em Max) at 660 nm. APC is designed to be excited by the Red (627-640 nm) laser and detected using an optical filter centered near 660 nm (e.g., a 660/20 nm bandpass filter). Please ensure that your instrument’s configurations (lasers and optical filters) are appropriate for this dye.
Red 627-640 nm
651 nm
660 nm
340939 Rev.1
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Development References (13)

  1. Bach JF. Regulatory T cells under scrutiny. Nat Rev Immunol. 2003; 3(3):189-198. (Biology). View Reference
  2. Greene WC, Leonard WJ. The human interleukin-2 receptor. Annu Rev Immunol. 1986; 4:69-95. (Biology). 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. (Biology). 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. 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
  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. (Biology). 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. (Biology). View Reference
  9. Schwarting R, Stein H. Knapp W, Dörken B, Gilks WR, et al, ed. Leucocyte Typing IV: White Cell Differentiation Antigens. New York, NY: Oxford University Press; 1989:455-460.
  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; 100:2159-2167. (Biology).
  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. (Biology). 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. (Biology). 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. (Biology). View Reference
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340939 Rev. 1

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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. 


Although not required, these products are manufactured in accordance with Good Manufacturing Practices.