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FITC Rat Anti-Mouse CD25 7D4 RUO

FITC Rat Anti-Mouse CD25 

Clone  7D4   (RUO)

  • Brand BD Pharmingen™
  • Alternative Name IL-2 Receptor α chain, p55
  • Concentration 0.5 mg/ml
  • Isotype Rat LEW, also known as Lewis IgM, κ
  • Reactivity Mouse (QC Testing) 
  • Application Flow cytometry (Routinely Tested) 
  • Immunogen IL-2-dependent BALB/c mouse helper T-cell clone HT-2
  • Storage Buffer Aqueous buffered solution containing ≤0.09% sodium azide.
  • Regulatory Status RUO
Product Details Recommended Assay References

Description

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.

This antibody is routinely tested by flow cytometric analysis. Other applications were tested at BD Biosciences Pharmingen during antibody development only or reported in the literature.

Format
  • Format FITC
  • Excitation Source Blue 488 nm
  • Excitation Max 494 nm
  • Emission Max 520 nm

FITC, fluorescein isothiocyanate, is a fluorochrome with a molecular weight of 389 Da. FITC is sensitive to pH changes and photobleaching. Due to nearly identical excitation and emission properties but different spillover characteristics, FITC and Alexa Fluor® 488 cannot be used simultaneously. FITC is relatively dim and should be reserved for highly expressed markers whenever possible.

Other Formats →

Suggested Companion Products

PE Rat Anti-Mouse CD25 PC61 RUO
0.2 mg Cat No: 553866

PE Streptavidin RUO
0.5 mg Cat No: 554061

FITC Rat IgM, κ Isotype Control RUO
0.25 mg Cat No: 553942

Resources & Tools
 Spectrum Viewer  Panel Designer  Spectrum Viewer  Download TDS  Regulatory Document Website
Preparation and Storage

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

Product Notices

  1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  2. Please refer to www.bdbiosciences.com/us/s/resources for technical protocols.
  3. Use of these products to measure activation antigens expressed on mononuclear cell subsets for the purpose of monitoring immunoregulatory status can fall under one or more claims of the following patents: US Patent Nos. 5,445,939, 5,656,446, 5,843,689; European Patent No. 319,543; Canadian Patent No. 1,296,622; Australian Patent No. 615,880; and Japanese Patent No. 2,769,156.
  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.


For detection of low-density CD25 expression, we recommend the use of the PE conjugate of PC61 antibody (Cat. No. 553866) or the biotin conjugate of the 7D4 antibody (Cat. No. 553069/553070) with a "bright" second-step reagent, such as Streptavidin-PE (Cat. No. 554061).


  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: Flow cytometry). 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: Flow cytometry). 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. (Biology: Flow cytometry). 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. (Biology: Flow cytometry). 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. Lorenzo F, Jaulin C, Vita N, et al. Structure-function study of the p55 subunit of murine IL-2 receptor by epitope mapping. J Immunol. 1991; 147(9):2970-2977. (Biology: Flow cytometry). View reference

  7. 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). View reference

  8. 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. (Biology: Flow cytometry). View reference

  9. 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. (Biology: Flow cytometry). View reference

  10. 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

  11. 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: Flow cytometry). View reference

  12. 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. (Biology: Flow cytometry). View reference

  13. 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: Flow cytometry). View reference

  14. 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. (Biology: Flow cytometry). View reference

  15. Taniguchi T, Minami Y. The IL-2/IL-2 receptor system: a current overview. Cell. 1993; 73(1):5-8. (Biology: Flow cytometry). View reference

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