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Alexa Fluor® 647 Rat Anti-Mouse CD25
Alexa Fluor® 647 Rat Anti-Mouse CD25

Flow cytometric analysis of CD25 expression on mouse splenocytes. Fresh mouse splenic leucocytes (Left Panel) or Concanavlin A-activated (3 days) mouse splenocytes (Right Panel) were preincubated with Purified Rat Anti-Mouse CD16/CD32 antibody (Mouse BD Fc Block™) (Cat. No. 553141/553142). The cells were then stained with either Alexa Fluor® 647 Rat Anti-Mouse CD25 antibody (Cat. No. 563598, solid line histogram) or Alexa Fluor® 647 Rat IgM, κ Isotype Control (Cat. No. 560892, dashed line histogram). The fluorescence histograms were derived from gated events with the forward and side light-scatter characteristics of viable cells. Flow cytometric analysis was performed using a BD™ LSR II Flow Cytometer System.

Flow cytometric analysis of CD25 expression on mouse splenocytes. Fresh mouse splenic leucocytes (Left Panel) or Concanavlin A-activated (3 days) mouse splenocytes (Right Panel) were preincubated with Purified Rat Anti-Mouse CD16/CD32 antibody (Mouse BD Fc Block™) (Cat. No. 553141/553142). The cells were then stained with either Alexa Fluor® 647 Rat Anti-Mouse CD25 antibody (Cat. No. 563598, solid line histogram) or Alexa Fluor® 647 Rat IgM, κ Isotype Control (Cat. No. 560892, dashed line histogram). The fluorescence histograms were derived from gated events with the forward and side light-scatter characteristics of viable cells. Flow cytometric analysis was performed using a BD™ LSR II Flow Cytometer System.

Product Details
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BD Pharmingen™
IL-2 Receptor α chain, p55
Mouse (QC Testing)
Rat LEW, also known as Lewis IgM, κ
IL-2-dependent BALB/c mouse helper T-cell clone HT-2
Flow cytometry (Routinely Tested)
0.2 mg/ml
AB_2738304
Aqueous buffered solution containing protein stabilizer and ≤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 Alexa Fluor® 647 under optimum conditions, and unreacted Alexa Fluor® 647 was removed.

Product Notices

  1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  2. An isotype control should be used at the same concentration as the antibody of interest.
  3. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
  4. The Alexa Fluor®, Pacific Blue™, and Cascade Blue® dye antibody conjugates in this product are sold under license from Molecular Probes, Inc. for research use only, excluding use in combination with microarrays, or as analyte specific reagents. The Alexa Fluor® dyes (except for Alexa Fluor® 430), Pacific Blue™ dye, and Cascade Blue® dye are covered by pending and issued patents.
  5. Alexa Fluor® is a registered trademark of Molecular Probes, Inc., Eugene, OR.
  6. Alexa Fluor® 647 fluorochrome emission is collected at the same instrument settings as for allophycocyanin (APC).
  7. 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.
  8. For fluorochrome spectra and suitable instrument settings, please refer to our Multicolor Flow Cytometry web page at www.bdbiosciences.com/colors.
563598 Rev. 1
Antibody Details
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7D4

The 7D4 monoclonal antibody specifically binds to CD25, the low affinity IL-2 Receptor (IL-2Rα, p55) expressed on activated T and B lymphocytes from all mouse strains tested. IL-2Rα by itself is not a signaling receptor. However, it can combine with IL-2 Receptor β (CD122) and γ (CD132) chains to form high-affinity, signaling receptor complexes for IL-2. Resting T and B lymphocytes as well as resting and activated NK cells do not express IL-2Rα.  CD25 is transiently expressed at a low level during normal B-cell development in the bone marrow on the CD45R/B220low TdT- sIg- Pre-B/Pre-B-II and CD45R/B220low TdT- sIgM+ sIgD- immature B stages, but not on the CD45R/B220low TdT+ sIg- Pro-B/Pre-B-I stage nor on CD45R/B220high TdTsIgM+ sIgD+ mature B cells.  It is expressed at a higher level during a very early stage of T-cell development in fetal and adult thymus. Peripheral CD25+ CD4+ T lymphocytes, called regulatory T (Treg) cells, are involved in the maintenance of self-tolerance. It has also been reported that dendritic cells express CD25, which is recognized by mAb 7D4. The 3C7 antibody recognizes an epitope of CD25 which is distinct from those recognized by mAbs 7D4 and PC61, and it blocks binding of IL-2 to CD25.

563598 Rev. 1
Format Details
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Alexa Fluor™ 647
Alexa Fluor™ 647 Dye is part of the BD red family of dyes. This is a small organic fluorochrome with an excitation maximum (Ex Max) at 653-nm and an emission maximum (Em Max) at 669-nm. Alexa Fluor 647 is designed to be excited by the Red laser (627-640 nm) and detected using an optical filter centered near 520-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.
Alexa Fluor™ 647
Red 627-640 nm
653 nm
669 nm
563598 Rev.1
Citations & References
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Development References (14)

  1. Chen J, Ma A, Young F, Alt FW. IL-2 receptor alpha chain expression during early B lymphocyte differentiation. Int Immunol. 1994; 6(8):1265-1268. (Biology). View Reference
  2. Crowley M, Inaba K, Witmer-Pack M, Steinman RM. The cell surface of mouse dendritic cells: FACS analyses of dendritic cells from different tissues including thymus. Cell Immunol. 1989; 118(1):108-125. (Clone-specific: Cytotoxicity). View Reference
  3. Garni-Wagner BA, Witte PL, Tutt MM, et al. Natural killer cells in the thymus. Studies in mice with severe combined immune deficiency. J Immunol. 1990; 144(3):796-803. (Clone-specific: Flow cytometry, Fluorescence activated cell sorting). View Reference
  4. Godfrey DI, Kennedy J, Mombaerts P, Tonegawa S, Zlotnik A. Onset of TCR-β gene rearrangement and role of TCR-β expression during CD3-CD4-CD8- thymocyte differentiation. J Immunol. 1994; 152(10):4783-4792. (Clone-specific: Flow cytometry, Fluorescence activated cell sorting). View Reference
  5. Habu S, Okumura K, Diamantstein T, Shevach EM. Expression of interleukin 2 receptor on murine fetal thymocytes. Eur J Immunol. 1985; 15(5):456-460. (Clone-specific: Flow cytometry). View Reference
  6. Malek TR, Robb RJ, Shevach EM. Identification and initial characterization of a rat monoclonal antibody reactive with the murine interleukin 2 receptor-ligand complex. Proc Natl Acad Sci U S A. 1983; 80(18):5694-5698. (Immunogen: Flow cytometry, Functional assay, Immunoprecipitation, Inhibition). View Reference
  7. Malek TR, Schmidt JA, Shevach EM. The murine IL 2 receptor. III. Cellular requirements for the induction of IL 2 receptor expression on T cell subpopulations. J Immunol. 1985; 134(4):2405-2413. (Clone-specific: Flow cytometry). View Reference
  8. Moreau JL, Nabholz M, Diamantstein T, Malek T, Shevach E, Theze J. Monoclonal antibodies identify three epitope clusters on the mouse p55 subunit of the interleukin 2 receptor: relationship to the interleukin 2-binding site. Eur J Immunol. 1987; 17(7):929-935. (Clone-specific: Blocking, Flow cytometry). View Reference
  9. Ortega G, Robb RJ, Shevach EM, Malek TR. The murine IL 2 receptor. I. Monoclonal antibodies that define distinct functional epitopes on activated T cells and react with activated B cells. J Immunol. 1984; 133(4):1970-1975. (Clone-specific: Flow cytometry). View Reference
  10. Pollard AM, Lipscomb MF. Characterization of murine lung dendritic cells: similarities to Langerhans cells and thymic dendritic cells. J Exp Med. 1990; 172(1):159-167. (Clone-specific: Depletion, Fluorescence microscopy, Immunofluorescence). View Reference
  11. Read S, Malmstrom V, Powrie F. Cytotoxic T lymphocyte-associated antigen 4 plays an essential role in the function of CD25(+)CD4(+) regulatory cells that control intestinal inflammation. J Exp Med. 2000; 192(2):295-302. (Clone-specific: Flow cytometry, Fluorescence activated cell sorting). View Reference
  12. Rolink A, Grawunder U, Winkler TH, Karasuyama H, Melchers F. IL-2 receptor alpha chain (CD25, TAC) expression defines a crucial stage in pre-B cell development. Int Immunol. 1994; 6(8):1257-1264. (Biology). View Reference
  13. Takahashi T, Tagami T, Yamazaki S, et al. Immunologic self-tolerance maintained by CD25(+)CD4(+) regulatory T cells constitutively expressing cytotoxic T lymphocyte-associated antigen 4. J Exp Med. 2000; 192(2):303-309. (Clone-specific: Flow cytometry, Fluorescence activated cell sorting). View Reference
  14. Taniguchi T, Minami Y. The IL-2/IL-2 receptor system: a current overview. Cell. 1993; 73(1):5-8. (Biology). View Reference
View All (14) View Less
563598 Rev. 1

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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.