Alexa Fluor® 488 anti-rat CD25 Antibody

Pricing & Availability
OX-39 (See other available formats)
Regulatory Status
Other Names
IL-2 receptor chain α, IL-2Rα, low affinity IL-2 receptor chain, Tac, p55, Ly-43
Mouse IgG1, κ
Ave. Rating
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Product Citations
Con A-activated (3-days) LOU rat splenocytes stained with OX-39 Alexa Fluor® 488
  • OX-39_Alx488_090707
    Con A-activated (3-days) LOU rat splenocytes stained with OX-39 Alexa Fluor® 488
Compare all formats See Alexa Fluor® 488 spectral data
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202108 100 µg 184€
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CD25 is a 55 kD glycoprotein also known as IL-2 receptor α chain. It is broadly expressed on activated T and B cells, a subset of thymic and splenic dendritic cells, and intestinal epithelial cells in the rat. IL-2 is a critical cytokine involved in lymphocyte proliferation and clonal expansion. IL-2 signaling requires the high affinity IL-2 receptor composed of IL-2 receptor chains α, β, and γ. The OX-39 antibody weakly inhibits IL-2 binding to the IL-2 receptor and has been shown to block some IL-2 mediated responses in vitro.

Product Details
Technical Data Sheet (pdf)

Product Details

Verified Reactivity
Antibody Type
Host Species
Rat T cell blasts from mixed lymphocyte reactions
Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
The antibody was purified by affinity chromatography and conjugated with Alexa Fluor® 488 under optimal conditions.
0.5 mg/ml
Storage & Handling
The antibody solution should be stored undiluted between 2°C and 8°C, and protected from prolonged exposure to light. Do not freeze.

FC - Quality tested

Recommended Usage

Each lot of this antibody is quality control tested by immunofluorescent staining with flow cytometric analysis. For flow cytometric staining, the suggested use of this reagent is ≤ 0.25 µg per million cells in 100 µl volume. It is recommended that the reagent be titrated for optimal performance for each application.

* Alexa Fluor® 488 has a maximum emission of 519 nm when it is excited at 488 nm.

Alexa Fluor® and Pacific Blue™ are trademarks of Life Technologies Corporation.

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Application Notes

Additional reported applications (for the relevant formats) include: immunohistochemistryof acetone-fixed frozen sections1, immunoprecipitation1, weakly blocks IL-2 binding1, 2, 3, and blocks IL-2 induced epithelial cell migration3.

Application References

(PubMed link indicates BioLegend citation)
  1. Peterson DJ, et al. 1987. Mol. Immunol. 24:1281. (IHC, IP, Block)
  2. Tellides G, et al. 1987. Transplant Proc. 19:4231. (Block)
  3. Digness AU, et al. 1996. Exp.Cell Res. 225:422. (Block)
Product Citations
  1. Chen KH, et al. 2019. J Neuropathol Exp Neurol. 78:65. PubMed
AB_2125458 (BioLegend Cat. No. 202108)

Antigen Details

Type I membrane glycoprotein, 55 kD

Activated T cells and B cells, thymic and splenic dendritic cells, intestinal epithelial cells

Low affinity receptor for IL-2; associates with IL-2 receptor β (CD122) and γ (CD132) chains to form high affinity receptor
Cell Type
B cells, Dendritic cells, Epithelial cells, T cells
Biology Area
Molecular Family
CD Molecules, Cytokine/Chemokine Receptors
Antigen References

1. Digness AU, et al. 1996. Exp.Cell Res. 225:422.
2. Peterson DJ, et al. 1987. Mol. Immunol. 24:1281.

Gene ID
16184 View all products for this Gene ID
View information about CD25 on

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Go To Top Version: 2    Revision Date: 06/27/2014

For research use only. Not for diagnostic use. Not for resale. BioLegend will not be held responsible for patent infringement or other violations that may occur with the use of our products.


*These products may be covered by one or more Limited Use Label Licenses (see the BioLegend Catalog or our website, BioLegend products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products, reverse engineer functionally similar materials, or to provide a service to third parties without written approval of BioLegend. By use of these products you accept the terms and conditions of all applicable Limited Use Label Licenses. Unless otherwise indicated, these products are for research use only and are not intended for human or animal diagnostic, therapeutic or commercial use.


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This data display is provided for general comparisons between formats.
Your actual data may vary due to variations in samples, target cells, instruments and their settings, staining conditions, and other factors.
If you need assistance with selecting the best format contact our expert technical support team.

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