IL-4 Protein, Human, Recombinant, Biotinylated

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IL-4 Protein, Human, Recombinant, Biotinylated: Product Information

Purity
> 93.8 % as determined by SDS-PAGE.
Endotoxin
< 1.0 EU per μg protein as determined by the LAL method.
Activity
Testing in progress
Protein Construction
A DNA sequence encoding the IL4 (P05112-1) (His25-Ser153) was expressed with a N-terminal Met. The purified protein was biotinylated in vitro.
Accession#
Expressed Host
E. coli
Species
Human
Predicted N Terminal
Met
Molecule Mass
The recombinant IL4 consists of 130 amino acids and predicts a molecular mass of 15.1 kDa.
Formulation
Lyophilized from sterile Sterile PBS.
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 -70℃
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, Biotinylated: Images

IL-4 Protein, Human, Recombinant, Biotinylated: 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.
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