Human IL-4, cct-premium (HSA) recombinant Protein

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Product Overview, Sizes and Prices



Synonyms: IL4, BCGF, BCDF, B cell stimulating factor (BSF-1).

Source: E. coli

Biological activity: ≥ 8 x 106 IU/mg

Purity: ≥ 98 % (SDS-PAGE, HPLC)

Physical state: Lyophilized

Manufacturer:  Active Bioscience

Article No. Size Price  
1515.951.005 5 g 90 €
1515.951.010 10 g 165 €
1515.951.025 25 g 270 €
1515.951.100 100 g 520 €

Please inquire for other vial sizes and custom vialing.



Product Details


IL4, BCGF, BCDF, B cell stimulating factor (BSF-1).


Description of Human IL-4, cct-premium (HSA)

Recombinant human Interleukin-4 is a 14.9 kDa globular protein containing 130 amino acid residues. IL-4 is a pleiotropic cytokine that regulates diverse T and B cell responses including cell proliferation, survival and gene expression. Produced by mast cells, T cells and bone marrow stromal cells, IL-4 regulates the differentiation of nave CD4+ T cells into helper Th2 cells, characterized by their cytokine-secretion profile that includes secretion of IL-4, IL-5, IL-6, and IL-13, which favour a humoral immune response. Another dominant function of IL-4 is the regulation of immunoglobin class switching to the IgG1 and IgE isotypes. Excessive IL-4 production by Th2 cells has been associated with elevated IgE production and allergy.


Biological Activity

The ED50 of ≤ 0.12 ng/ml was determined by the dose-dependent stimulation of the proliferation of human TF-1 cells. In direct comparison with the WHO standard (NIBSC 88/656) it corresponds to a specific activity of ≥ 8 x 106 IU/mg.



We recommend a quick spin followed by reconstitution in water to a concentration of at least 0.1mg/ml. This solution can then be diluted into other aqueous buffers and stored at 4C for 1 week or -20C for future use.



The lyophilized protein is stable for at least 2 years from date of receipt at -20C. Reconstituted IL-4 is stable for at least 3 months when stored in working aliquots with a carrier protein at -20C. Please avoid repeated freeze-thaw cycles.


Lupe Zoom

Amino Acid Sequence



Shipping symbol Shipped at room temperature









To buy Human IL-4, cct-premium (HSA) (W1515951005, W1515951010, W1515951025, W1515951100) please click on the Shopping List Symbol right from the indicated price. This will add the product to your Shopping List. You can then click on the button Shopping List & Order Form or the Shopping List Symbol in the top navigation to ask for a quote. We will send you your quote as soon as possible. Our offer will include institutional discounts where applicable.


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