Recombinant Mouse IL-9 (carrier-free)

Pricing & Availability
Regulatory Status
Other Names
P40, MEA (mast cell growth enhancing activity), MCGF (Mast cell growth factor), TCGF-3 (T cell growth factor-3)
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Product Citations
Recombinant mouse IL-9 induces proliferation of M-07e, a human megakaryocytic leukemic cell line, in a dose dependent manner.
  • IL-9_Mouse_RECOM_BA_091014.jpg
    Recombinant mouse IL-9 induces proliferation of M-07e, a human megakaryocytic leukemic cell line, in a dose dependent manner.
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556002 10 µg 336€
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556004 25 µg 662€
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IL-9 was initially identified in mice as a T cell growth factor. Human and murine IL-9 show 56% amino acid sequence homology. IL-9 is a cytokine that acts as a regulator of a variety of hematopoietic cells, stimulates cell proliferation, and prevents apoptosis. The IL-9 receptor consists of the cytokine-specific IL-9 receptor α-chain (IL-9Rα) and the common γ-chain that is shared by IL-2, IL-4, IL-7, IL-15 and IL-21. IL-9 is expressed by activated Th9, Th17, Treg, and mast cells and appears to play important roles in the development and function of subsets within the CD4+ T cell lineage. IL-9 also inhibits immune responses by enhancing the suppressive properties of Tregs and by recruiting immune suppressive mast cells to sites of inflammation. Genetic studies on a mouse model of asthma demonstrated that this cytokine is a key factor in the pathogenesis of bronchial hyperresponsiveness. In this sense, it has been described that IL-9 and IL-9R expression are increased in lungs of asthmatic patients. In addition, IL-9 promotes mast cell mediated intestinal permeability and plays a role in the development of food allergies. Also, IL-9 has been associated with atopic dermatitis.

Product Details
Technical Data Sheet (pdf)

Product Details

Mouse IL-9, amino acids (Gln19-Pro144) (Accession# NP_032399), was expressed in insect cells.
Molecular Mass
The 125 amino acid recombinant protein has a predicted molecular mass of approximately 14 kD. The DTT-reduced protein migrate as multiple bands between 17-25 kD by SDS-PAGE due to different glycosylation. The predicted N-terminal amino acid is Gln.
>95%, as determined by Coomassie stained SDS-PAGE.
0.22 µm filtered protein solution is in PBS.
Endotoxin Level
Less than 0.1 EU per µg of protein as determine by the LAL method.
10 and 25 µg sizes are bottled at 200 µg/mL.
Storage & Handling
Unopened vial can be stored between 2°C and 8°C for up to 2 weeks, at -20°C for up to six months, or at -70°C or colder until the expiration date. For maximum results, quick spin vial prior to opening. The protein can be aliquoted and stored at -20°C or colder. Stock solutions can also be prepared at 50 - 100 µg/mL in appropriate sterile buffer, carrier protein such as 0.2 - 1% BSA or HSA can be added when preparing the stock solution. Aliquots can be stored between 2°C and 8°C for up to one week and stored at -20°C or colder for up to 3 months. Avoid repeated freeze/thaw cycles.
Mouse IL-9 induces proliferation of MO7e cells. The ED50 is 0.04 - 0.16 ng/ml, corresponding to a specific activity of 6.5 - 25.0 x 106 units/mg.


Application Notes

BioLegend carrier-free recombinant proteins provided in liquid format are shipped on blue-ice. Our comparison testing data indicates that when handled and stored as recommended, the liquid format has equal or better stability and shelf-life compared to commercially available lyophilized proteins after reconstitution. Our liquid proteins are verified in-house to maintain activity after shipping on blue ice and are backed by our 100% satisfaction guarantee. If you have any concerns, contact us at

Antigen Details

Th2 cells, mast cells, activated Th9, Th17, and Treg cells.
Autocrine growth and activation factor for Th17, Tregs, and mast cells. IL-1, histamine, and LPS induce the expression of IL-9 in mast cells. IL-9 is induced synergistically by IL-2, IL-4, and TGFβ and inhibited by IFNγ in naïve CD4 T cells.
T helper cells, Th9, Th17, Tregs, human airway smooth muscle cells.
IL-9R complex (IL-9Rα and γ chain)
Mouse IL-9 induces proliferation of M-07e cells.
Cell Type
Hematopoietic stem and progenitors
Biology Area
Cell Biology, Stem Cells, Immunology
Molecular Family
Antigen References

1. Goswami R. and Kaplan MH. 2011. J. Immunol. 186:3283.
2. Kaiko GE. and Foster PS. 2011. Curr. Opin. Allergy Clin. Immunol. 11:39.
3. Townsend JM. et al. 2000 Immunity 13:573.
4. Mock BA. et al. 1990. Immunogenetics. 31:265.
5. Tan C. et al. 2010. J. Immunol. 185:6795.
6. Jager A. et al. 2009. J. Immunol. 183:7169.
7. Sismanopoulos N, et al. 2012 PLoS One 7(3):e33271.

Gene ID
16198 View all products for this Gene ID
View information about IL-9 on

Related FAQs

Why choose BioLegend recombinant proteins?

     • Each lot of product is quality-tested for bioactivity as indicated on the data sheet.
     • Greater than 95% Purity or higher, tested on every lot of product.
     • 100% Satisfaction Guarantee for quality performance, stability, and consistency.
     • Ready-to-use liquid format saves time and reduces challenges associated with reconstitution.
     • Bulk and customization available. Contact us.
     • Learn more about our Recombinant Proteins.

How does the activity of your recombinant proteins compare to competitors?

We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!

What is the specific activity or ED50 of my recombinant protein?

The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.

Have your recombinants been tested for stability?

Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.

Does specific activity of a recombinant protein vary between lots?

Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.

How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?
Use formula Specific activity (Units/mg) = 10e6/ ED50 (ng/mL)
Go To Top Version: 2    Revision Date: 11/21/2016

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.


BioLegend Inc., 8999 BioLegend Way, San Diego, CA 92121
Toll-Free Phone: 1-877-Bio-Legend (246-5343) Phone: (858) 768-5800 Fax: (877) 455-9587


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