PE anti-mouse CD121a (IL-1 R, Type I/p80) Antibody

Pricing & Availability
JAMA-147 (See other available formats)
Regulatory Status
Other Names
IL-1 Receptor type I, IL-1RI, p80
Armenian Hamster IgG
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Product Citations
NIH/3T3 cell line stained with JAMA-147 PE
  • JAMA-147
    NIH/3T3 cell line stained with JAMA-147 PE
See PE spectral data
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113505 50 µg $100.00
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CD121a is an 80 kD IL-1 receptor type I. It is a transmembrane glycoprotein and a member of the immunoglobulin superfamily expressed on T cells, thymocytes, dendritic cells, fibroblasts, vascular endothelial cells, epithelial cells and neural cells. CD121a binds the mature forms of IL-1α, IL-1β, and IL-1Ra proteins. High affinity binding and signaling by the type I IL-1 receptor requires CD121a and the accessory protein, IL-1R AcP, which does not bind IL-1 alone, but forms a dimer capable of binding IL-1.

Product Details
Technical data sheet

Product Details

Antibody Type
Host Species
Armenian Hamster
Extracellular domain of mouse IL-1R1
Phosphate-buffered solution, pH 7.2, containing 0.09% sodium azide.
The antibody was purified by affinity chromatography, and conjugated with PE under optimal conditions.
0.2 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 ≤1.0 µg per million cells in 100 µl volume. It is recommended that the reagent be titrated for optimal performance for each application.

Excitation Laser
Blue Laser (488 nm)
Green Laser (532 nm)/Yellow-Green Laser (561 nm)
Application Notes

Additional reported applications (for the relevant formats) include: immunoprecipitation1 and receptor blocking in vivo1. Clone JAMA-147 prevents the binding of IL-1 to the type 1 IL-R1,2. The LEAF™ or Ultra-LEAF™ purified antibody is recommended for neutralization and functional assays (contact our custom solutions team).

For the most successful immunofluorescent staining results, it may be important to maximize signal over background by using a relatively bright fluorochrome-antibody conjugate (Cat. No. 113506) or by using a high sensitivity, three-layer staining technique (e.g., including a biotinylated antibody (Cat. No. 113504) or biotinylated anti-Armenian hamster IgG second step (Cat. No. 405501), followed by SAv-PE (Cat. No. 405204)).

Application References

(PubMed link indicates BioLegend citation)
  1. Rogers HK, et al. 1992. P. Natl. Acad. Sci. USA 89:1011. (Neut)
  2. Rogers HW, et al. 1994. J. Immunol. 153:2093. (Neut)
  3. Mishra R, et al. 2013. J. Immunol. 191:961. PubMed
Product Citations
  1. Zhang CJ, et al. 2018. J Clin Invest. 128:5399. PubMed
  2. Oliveira AC et al. 2017. eLife. 6 pii: e30883. PubMed
  3. Mishra R, et al. 2013. J Immunol. 191:961. PubMed
  4. Martin B, et al. 2016. Nat Immunol. 17:583-592. PubMed
AB_2125036 (BioLegend Cat. No. 113505)

Antigen Details

Ig superfamily, complex of CD121a and IL-1R AcP forms high affinity IL-1 binding site, 80 kD

T cells, thymocytes, dendritic cells, fibroblasts, vascular endothelial cells, epithelial cells, neural cells

Innate and adaptive immune response
IL-1α and IL-1β
Cell Type
T cells, Thymocytes, Dendritic cells, Fibroblasts, Endothelial cells, Epithelial cells
Biology Area
Immunology, Innate Immunity
Molecular Family
CD Molecules, Cytokine/Chemokine Receptors
Antigen References

1. Sims JE. 2002. Curr. Opin. Immunol. 14:117.
2. Rogers HK, et al. 1992. P. Natl. Acad. Sci. USA 89:1011.

Gene ID
16177 View all products for this Gene ID
View information about CD121a on

Related FAQs

What type of PE do you use in your conjugates?
We use R-PE in our conjugates.
Go To Top Version: 1    Revision Date: 11/30/2012

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*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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