Biotin anti-mouse CD123 Antibody

Pricing & Availability
5B11 (See other available formats)
Regulatory Status
Other Names
IL-3 Receptor α chain, IL-3Rα
Rat IgG2a, κ
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Product Citations
C57BL/6 bone marrow cells double stained with CD11b FITC and biotinylated 5B11, followed by Sav-PE
  • A_5B11_Biotin_082109.jpg
    C57BL/6 bone marrow cells double stained with CD11b FITC and biotinylated 5B11, followed by Sav-PE
  • B_5B11_Biotin_082109.jpg
    C57BL/6 bone marrow cells double stained with rat IgG2a (Clone RTK2758) biotin isotype control followed by Sav-PE and CD11b (Clone M1/70) FITC
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106003 50 µg $89
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CD123 is a 70 kD α chain subunit of the IL-3 receptor (IL-3R α). It is a member of the immunoglobulin superfamily that is expressed on hematopoietic progenitors, basophils, mast cells, and megakaryocytes. This transmembrane glycoprotein can bind IL-3 with low affinity but cannot transduce signals without association with additional protein partners. CD123 can complex with either the common β chain (CDw131) or the IL-3R β chain (AIC2A) to form high-affinity heterodimeric IL-3 receptors. CDw131 can complex with the α subunits of the mouse IL-3R, IL-5R and GM-CSFR to form high-affinity receptors, while the IL-3 R β subunit is specific for IL-3 but binds with low affinity. IL-3 binding to the receptor complex can induce proliferation and differentiation of hematopoietic cells. The 5B11 antibody does not block binding of IL-3 to the high affinity IL-3 receptor.

Product Details
Technical data sheet

Product Details

Verified Reactivity
Antibody Type
Host Species
CTLL cells transfected with the mouse IL-3Rα chain
Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
The antibody was purified by affinity chromatography, and conjugated with biotin under optimal conditions.
0.5 mg/ml
Storage & Handling
The antibody solution should be stored undiluted between 2°C and 8°C. 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 106 cells in 100 µl volume. It is recommended that the reagent be titrated for optimal performance for each application.
Application Notes

For most successful immunofluorescent staining results, it may be important to maximize signal over background by using a relatively bright fluorochrome-antibody conjugate (Cat. No. 106006) or by using a high sensitivity, three-layer staining technique (e.g., including a biotinylated antibody (Cat. No. 106004) or biotinylated anti-rat IgG second step (Cat. No. 405402), followed by SAv-PE (Cat. No. 405204)). To reduce non-specific binding to cells bearing Fc-receptors, pre-incubation of cells with anti-mouse CD16/CD32, clone 93 (Cat. No. 101301/101302), is recommended prior to immunofluorescent staining.

Application References

(PubMed link indicates BioLegend citation)
  1. Ichihara, et al. 1995. EMBO J. 14:939. (FC)
  2. Mueller DL, et al. 1994. J. Immunol. 153:3014. (FC)
  3. Cervantes-Barragan L, et al. 2007. Blood 109:1131. (FC)
Product Citations
  1. Knox T, et al. 2019. Sci Rep. 9:6136. PubMed
AB_2124404 (BioLegend Cat. No. 106003)

Antigen Details

Ig superfamily, associates with CDw131 (common β chain) or IL-3 receptor β chain, 70 kD

Hematopoietic progenitors, basophils, mast cells, megakaryocytes

Proliferation, differentiation of hematopoietic cells
Cell Type
Basophils, Dendritic cells, Hematopoietic stem and progenitors, Mast cells, Megakaryocytes
Biology Area
Molecular Family
CD Molecules, Cytokine/Chemokine Receptors
Antigen References

1. Barclay A, et al. 1997. The Leukocyte Antigen FactsBook Academic Press.
2. Miyajima A, et al. 1993. Blood 82:1960.
3. Itoh N, et al. 1990. Science 247:324.

Gene ID
16188 View all products for this Gene ID
View information about CD123 on

Related FAQs

How many biotin molecules are per antibody structure?
We don't routinely measure the number of biotins with our antibody products but the number of biotin molecules range from 3-6 molecules per antibody.
Go To Top Version: 1    Revision Date: 11/30/2012

For Research Use Only. Not for diagnostic or therapeutic use.


This product is supplied subject to the terms and conditions, including the limited license, located at ("Terms") and may be used only as provided in the Terms. Without limiting the foregoing, BioLegend products may not be used for any Commercial Purpose as defined in the Terms, resold in any form, used in manufacturing, or reverse engineered, sequenced, or otherwise studied or used to learn its design or composition without express written approval of BioLegend. Regardless of the information given in this document, user is solely responsible for determining any license requirements necessary for user’s intended use and assumes all risk and liability arising from use of the product. BioLegend is not responsible for patent infringement or any other risks or liabilities whatsoever resulting from the use of its products.


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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.
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