Bovine IL-13 (Yeast-derived Recombinant Protein) - 5 microgrrams

In Stock
Data SheetAdd to Cart

Bulk quantities of proteins are available. Please contact us for bulk pricing.

Interleukin 13 (IL-13) is secreted by many cell types, but especially T helper type 2 (Th2) cells. IL-13 is an important mediator of allergic inflammation and disease. In addition to effects on immune cells, IL-13 is implicated as a central mediator of the physiologic changes induced by allergic inflammation in many tissues. The functions of IL-13 overlap considerably with those of IL-4, especially with regard to changes induced on hematopoietic cells, but these effects are probably less important given the more potent role of IL-4. Thus, although IL-13 can induce immunoglobulin E (IgE) secretion from activated human B cells, deletion of IL-13 from mice does not markedly affect either Th2 cell development or antigen-specific IgE responses induced by potent allergens. In comparison, deletion of IL-4 abrogates these responses. Thus, rather than a lymphoid cytokine, IL-13 acts more prominently as a molecular bridge linking allergic inflammatory cells to the non-immune cells in contact with them, thereby altering physiological function.

The biological activity of recombinant bovine IL-13 was measured in a cell proliferation assay using the human TF-1 cell line. The ED50 for this effect is typically 20  - 30 ng/mL.

Alternate Names - IL13, IL-13, P600, interleukin 13

IL-13 Homology Across Species
Bos taurus (cattle) IL-13 - 100%
Bubalus bubalis (water buffalo) IL-13 – 100%
Bos indicus (zebu) IL-13 – 100%
Bos mutus (wild yak) IL-13 – 99%
Bison bison bison (American buffalo) – 99%
​More -

Bovine IL-13 (Yeast-derived Recombinant Protein) - 5 microgrrams
Catalog No.:
5 ug
The Bovine IL-13 recombinant protein was produced in yeast and therefore does not have endotoxin, is naturally folded, and post-translationally modified.
The Bovine IL-13 recombinant protein has a predicted molecular weight of 12.6 kDa.
Protein Sequence:
Country of Origin:
The Bovine IL-13 endotoxin-free recombinant protein can be used in cell culture, as an IL-13 ELISA Standard, and as a Western Blot Control.


The chronic stages of bovine Fasciola hepatica are dominated by CD4 T-cell exhaustion

Sachdev D, Gough KC, Flynn RJ.

J Immunol. 2014 Jul 15;193(2):597-609

Applications: Bovine IL-2 was used to stimulate cells. Bovine IL-2 and IL-13 were measure in cell culture supernatants by ELISA.


Fasciola hepatica infection of ruminants leads to non-resolving chronic infection, as patency develops, there is switching to a TGF-β and IL-10 led response. Here, we explore the responses of CD4 T-cells within the major draining lymph nodes. We found minimal expression of Foxp3 within CD4 cells but elevated levels within the γδ (WC1+) population. There is a strong T-cell-intrinsic exhaustion phenotype within the hepatic lymph node (HLN) characterized by a lack of antigen-specific proliferation and cytokine secretion. CD4 T-cells recovered from the HLN had high levels of PD-1 expression and low levels of IL-2 secretion. Exogenous IL-2 partially rescued this defect; when combined with neutralization of IL-10 and TGF-β, full restoration of proliferation, and cytokine production was achieved. Moreover, there is a clear uncoupling of the mechanisms that facilitate this regulation with parasite-specific proliferation and cytokine secretion being governed by independent means. These data would suggest that there is a CD4 T-cell-intrinsic regulation in place early in chronic infection, potentially leading to failure in resistance to reinfection.



Dynamics of IL-4 and IL-13 expression in the airways of sheep following allergen challenge.

Liravi B, Piedrafita D, Nguyen G, Bischof RJ.

BMC Pulm Med. 2015 Sep 11;15:101. doi: 10.1186/s12890-015-0097-9.

Applications: Measurement of ovine IL-13 in cell culture supernatants by ELISA


Background: IL-4 and IL-13 play a critical yet poorly understood role in orchestrating the recruitment and activation of effector cells of the asthmatic response and driving the pathophysiology of allergic asthma. The house dust mite (HDM) sheep asthma model displays many features of the human condition and is an ideal model to further elucidate the involvement of these critical Th2 cytokines. We hypothesized that airway exposure to HDM allergen would induce or elevate the expression profile of IL-4 and IL-13 during the allergic airway response in this large animal model of asthma.

Methods: Bronchoalveolar lavage (BAL) samples were collected from saline- and house dust mite (HDM)- challenged lung lobes of sensitized sheep from 0 to 48 h post-challenge. BAL cytokines (IL-4, IL-13, IL-6, IL-10, TNF-α) were each measured by ELISA. IL-4 and IL-13 expression was assessed in BAL leukocytes by flow cytometry and in airway tissue sections by immunohistology.

Results: IL-4 and IL-13 were increased in BAL samples following airway allergen challenge. HDM challenge resulted in a significant increase in BAL IL-4 levels at 4 h compared to saline-challenged airways, while BAL IL-13 levels were elevated at all time-points after allergen challenge. IL-6 levels were maintained following HDM challenge but declined after saline challenge, while HDM administration resulted in an acute elevation in IL-10 at 4 h but no change in TNF-α levels over time. Lymphocytes were the main early source of IL-4, with IL-4 release by alveolar macrophages (AMs) prominent from 24 h post-allergen challenge. IL-13 producing AMs were increased at 4 and 24 h following HDM compared to saline challenge, and tissue staining provided evidence of IL-13 expression in airway epithelium as well as immune cells in airway tissue.

Conclusion: In a sheep model of allergic asthma, airway inflammation is accompanied by the temporal release of key cytokines following allergen exposure that primarily reflects the Th2-driven nature of the immune response in asthma. The present study demonstrates for the first time the involvement of IL-4 and IL-13 in a relevant large animal model of allergic airways disease.


Classically or alternatively activated bovine monocyte-derived macrophages in vitro do not resemble CD163/Calprotectin biased macrophage populations in the teat.

Düvel A, Frank C, Schnapper A, Schuberth HJ, Sipka A

Innate Immun. 2012 May 23.

Applications: Stimulation of bovine MDM cells.

The functional phenotype of resident macrophages significantly determines the character of an inflammatory response. In this study we identified two phenotypes of tissue macrophages in bovine teat tissue based on expression of Calprotectin and CD163. To investigate a possible link between the dichotomy in phenotype and functional properties of cells in association with different host mediators we set up an in vitro model with bovine monocyte-derived macrophages (MdM). In vitro differentiated MdM invariably and uniformly expressed both antigens. Classically activated MdM (IFN-γ priming and LPS stimulation) showed a decreased CD163 expression while alternative activation (IL-4/IL-13 priming) did not change expression of CD163 and Calprotectin. Differently activated MdM showed a clearly distinct expression of genes related to classical (IL-12, inducible NO synthase) or alternative activation (IL-10, arginase I). The presence of the inflammatory host mediator prostaglandin E(2) (PGE(2)) neither influenced expression of Calprotectin and CD163 nor gene expression profiles in MdM generated in the presence of PGE(2) (PGE(2)-MdM). Supernatants of PGE(2-)MdM, however, significantly dampened the migration of neutrophilic granulocytes. The results of this study highlight the discrepancy between in vivo and in vitro obtained macrophages and point to the necessity to analyze the functional capacities of bovine tissue macrophages in situ.

Ordering Information & Terms and Conditions

Placing Orders
We require a phone number and e-mail address for both the end user of the ordered product and your institution's Accounts Payable representative. This information is only used to help with technical and billing issues.

Via Phone
Please call us at 651-646-0089 between the hours of 8:30 a.m. and 5:30 p.m. CST Mon - Fri.

Via Fax
Orders can be faxed to us 24 hours a day at 651-646-0095.

Via E-mail
Please e-mail orders to

Via Mail
Please mail your order to:
Sales Order Entry
Kingfisher Biotech, Inc.
1000 Westgate Drive
Suite 123
Saint Paul, MN 55114

Product Warranty
Kingfisher Biotech brand products are warranted by Kingfisher Biotech, Inc. to meet stated product specifications and to conform to label descriptions when used, handled and stored according to instructions. Unless otherwise stated, this warranty is limited to one year from date of sale. Kingfisher Biotech’s sole liability for the product is limited to replacement of the product or refund of the purchase price. Kingfisher Biotech brand products are supplied for research applications. They are not intended for medicinal, diagnostic or therapeutic use. The products may not be resold, modified for resale or used to manufacture commercial products without prior written approval from Kingfisher Biotech.

Payment Terms
All prices are subject to change without notice. Payment terms are net thirty (30) days from receipt of invoice. A 1.5% service charge per month is added for accounts past due over 30 days. Prices quoted are U.S. Dollars. The purchaser assumes responsibility for any applicable tax. You will only be charged for products shipped. Products placed on back order will be charged when shipped. If you place an order and fail to fulfill the terms of payment, Kingfisher Biotech, Inc. may without prejudice to any other lawful remedy defer further shipments and/or cancel any order. You shall be liable to Kingfisher Biotech, Inc. for all costs and fees, including attorneys' fees, which Kingfisher Biotech, Inc. may reasonably incur in any actions to collect on your overdue account. Kingfisher Biotech, Inc. does not agree to, and is not bound by, any other terms or conditions such as terms in a purchase order that have not been expressly agreed to in writing signed by a duly authorized officer of Kingfisher Biotech, Inc.

Shipping and handling costs are prepaid and added to the invoice. Shipping and handling costs will be charged only on the first shipment in situations where an order contains back ordered products. Kingfisher Biotech, Inc. reserves the right to select the packaging and shipping method for your order, which will ensure the stability of the product and also efficient tracing. Domestic orders will normally be shipped by overnight. Damage during shipment is covered by the warranty provided in these terms and conditions. For international orders, title to the goods passes in the United States when the goods are placed with the shipper. For all orders, the risk of loss of the goods passes when the goods are placed with the shipper.

Please call customer service before returning any products for refund, credit or replacement. NO returns will be accepted without prior written authorization. Returns are subject to a restocking fee of 20%.

Please note that Cookies and JavaScript are required for you to view this website.

Check if you have Cookies and JavaScript enabled in your browser