| Product name | Mouse IL-4 protein |
| Sequence | Amino acid sequence derived from Mouse IL4 (NP_067258.1) (His23-Ser140) was expressed. |
| Activity | Measured in a cell proliferation assay using NFS-60. The ED50 for this effect is typically 5.37 ng/mL. The specific activity of recombinant Mouse IL4 is approximately >1.86 x 105 IU/mg. |
| Protein length | The recombinant Mouse IL4 consists of 119 amino acids and predicts a molecular mass of 13.4 KDa |
| Preparation method | E. coli |
| Purity | > 95% as determined by SDS-PAGE. |
| Molecular Formula | 13.4 kDa |
| Alternative | B-cell lgG differentiation factor; B-cell growth factor 1; B-cell stimulatory factor 1 (BSF-1); lGG1 induction factor; Lymphocyte stimulatory factor 1 |
| Formulation | Lyophilized from sterile PBS, pH 7.4 |
| Features & Benefits | Endotoxin:<1 EU per 1 μg of the protein by the LAL method. |
| Molecular weight | 13.4 kDa |
| Usage notes | Always centrifuge tubes before opening. It is recommended to reconstitute the lyophilized Mouse IL4 protein in sterile ddH2O not less than 100µg/ml, which can then be further diluted to other aqueous solutions. |
| Storage instructions | Lyophilized Mouse IL4 protein product should be stored desiccated below -20°C. Upon reconstitution, the protein should be stored at 4°C between 2-7 days and for future use below -18°C. For long term storage it is recommended to add a carrier protein (0.1% HSA or BSA). Please prevent freeze-thaw cycles |
| Shipping | Gel pack with blue ice. |
| Precautions | The product listed herein is for research use only and is not intended for use in human or clinical diagnosis. Suggested applications of our products are not recommendations to use our products in violation of any patent or as a license. We cannot be responsible for patent infringements or other violations that may occur with the use of this product. |
| Background | Interleukin-4, also known as IL4, is a secreted protein which belongs to the IL-4 / IL-13 family. Interleukin-4 / IL4 has many biological roles, including the stimulation of activated B-cell and T-cell proliferation. It enhances both secretion and cell surface expression of IgE and IgG1. Interleukin-4 / IL4 also regulates the expression of the low affinity Fc receptor for IgE (CD23) on both lymphocytes and monocytes. Interleukin-4 is essential for the switching of B cells to IgE antibody production and for the maturation of T helper (Th) cells toward the Th2 phenotype. It participates in at least several B-cell activation processes as well as of other cell types. However, studies show that double mutant (Q116D, Y119D) of the murine IL4 protein (QY), both glutamine 116 and tyrosine 119, which binds to the IL4 receptor alpha, completely inhibites in a dose-dependent manner the IL4-induced proliferation of lipopolysaccharide-stimulated murine splenic B-cells, of the murine T cell line CTLL-2, and of the murine pre-B-cell line BA/F3. QY also inhibited the IL4-stimulated up-regulation of CD23 expression by lipopolysaccharide-stimulated murine splenic B-cells and abolished tyrosine phosphorylation of the transcription factor Stat6 and the tyrosine kinase Jak3 in IL4-stimulated BA/F3 cells. |
| Gene ID | 16189 |
| Alternative | B-cell lgG differentiation factor; B-cell growth factor 1; B-cell stimulatory factor 1 (BSF-1); lGG1 induction factor; Lymphocyte stimulatory factor 1 |
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