IL-4 Protein, Human, Recombinant

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IL-4 Protein, Human, Recombinant: Product Information

Purity
> 92 % as determined by SDS-PAGE
Endotoxin
Please contact us for more information.
Activity
Measured in a cell proliferation assay using TF-1 human erythroleukemic cells. The ED50 for this effect is 0.05-0.2 ng/mL.
The specific activity of Recombinant Human IL-4 is approximately 3.2 × 10E4 IU/μg
Protein Construction
A DNA sequence encoding the mature form of human IL4 isoform 1 (P05112-1) (His 25-Ser 153) was expressed and purified, with an initial Met.
Accession#
Expressed Host
E. coli
Species
Human
Predicted N Terminal
Met
Molecule Mass
The recombinant human IL4 consisting of 130 amino acids and migrates with an apparent molecular mass of 15 kDa as predicted.
Formulation
Lyophilized from sterile 20mM MES, 200mM NaCl, pH 6.0
1. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Please refer to the specific buffer information in the hard copy of CoA.
Shipping
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Stability & Storage
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃
Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution
A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

IL-4 Protein, Human, Recombinant: Images

IL-4 Protein, Human, Recombinant: Alternative Names

BCGF-1 Protein, Human; BCGF1 Protein, Human; BSF-1 Protein, Human; BSF1 Protein, Human; IL-4 Protein, Human; Interleukin-4 Protein, Human

IL-4 Background Information

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.
Full Name
interleukin 4
References
  • Grunewald SM. et al., 1998, J Immunol. 160 (8): 4004-9.
  • Susanne M. et al, 1997, THE JOURNAL OF BIOLOGICAL CHEMISTRY. 272 (3): 1480-3.
  • Nishikubo K. et al., 2003, Gene Ther. 10 (26): 2119-25.
  • Molecular cloning, recombinant expression and characterization of GMCSF from the rhesus monkey, Macaca mulatta
    Author
    Tao, Z;Yang, H;Jia, D;Wan, L;Cheng, J;Lu, X;
    Year
    2013
    Journal
    Dev. Comp. Immunol.
    Application
    cell-based (culture)
  • IL-1β from M2 macrophages promotes migration and invasion of ESCC cells enhancing epithelial-mesenchymal transition and activating NF-κB signaling pathway
    Author
    Zhou, J;Zheng, S;Liu, T;Liu, Q;Chen, Y;Tan, D;Ma, R;Lu, X;
    Year
    2018
    Journal
    J. Cell. Biochem.
  • ROCK Inhibitor Y27632 Induced Morphological Shift and Enhanced Neurite Outgrowth-Promoting Property of Olfactory Ensheathing Cells via YAP-Dependent Up-Regulation of L1-CAM
    Author
    Li, Y;Huo, S;Fang, Y;Zou, T;Gu, X;Tao, Q;Xu, H;
    Year
    2018
    Journal
    Front. Cell. Neurosci.
    Application
    cell-based
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