Human IL-4, premium grade (IL4-H4218) is expressed from human 293 cells (HEK293). It contains AA His 25 - Ser 153 (Accession # P05112-1 ).
Predicted N-terminus: His 25
Human IL-4, premium grade (IL4-H4218), designed for preclinical stage, has the same activity and performance with GMP Human IL-4, which enables a seamless transition from preclinical development to clinical phases. Premium Grade product offer a cost efficient alternative of GMP Grade products for the early development phase when safety of raw materials is not top priority. By using Premium Grade products in early development phase, you can transition easily into clinical and commercial phase without need to revalidate the raw materials and modify manufacturing process.
Request for sequence
This protein carries no "tag"
The protein has a calculated MW of 15.0 kDa. The protein migrates as 15 kDa and 19 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.
Less than 0.1 EU per μg by the LAL method.
The sterility testing was performed by membrane filtration method.
>90% as determined by SDS-PAGE.
Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 with trehalose as protectant.
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Please see Certificate of Analysis for specific instructions.
For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.
For long term storage, the product should be stored at lyophilized state at -20°C or lower.
Please avoid repeated freeze-thaw cycles.
This product is stable after storage at:
- -20°C to -70°C for 12 months in lyophilized state;
- -70°C for 3 months under sterile conditions after reconstitution.
Human IL-4, premium grade on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 90%.
活性（Bioactivity）-Bioactivity CELL BASE
Human IL-4, premium grade (Cat. No. IL4-H4218) situmulates proliferation of TF-1 cells. The specific activity of Human IL-4, premium grade (Cat. No. IL4-H4218) is > 1.0ⅹ10^7 IU/mg, which is calibrated against human IL4 WHO International Stand (NIBSC code: 88/656) (Routinely tested).
Human IL-4, premium grade (Cat. No. IL4-H4218) stimulates the proliferation of TF-1 human erythroleukemic cells. The ED50 for this effect is 0.27-0.49 ng/mL (Routinely tested).
Immobilized Human IL-4, premium grade (Cat. No. IL4-H4218) at 5 μg/mL (100 μL/well) can bind Biotinylated Human IL-4 R alpha, Avitag,His Tag (Cat. No. ILR-H82E9) with a linear range of 2-78 ng/mL (QC tested).
Immobilized Human IL-4, premium grade (Cat. No. IL4-H4218) at 5 μg/mL (100 μL/well)can bind Human IL-4 R alpha, Fc Tag (Cat. No. ILR-H5253) with a linear range of 1-20 ng/mL (Routinely tested).
Interleukin-4, is a cytokine that induces differentiation of naive helper T cells (Th0 cells to Th2 cells). In the presence of IL-4 and IL-13, cytokines that are produced in a Th-2 type response, particularly during allergy and parasitic infections, macrophages become differentially activated, And this cytokine is a ligand for interleukin 4 receptor. The interleukin 4 receptor also binds to IL13, which may contribute to many overlapping functions of this cytokine and IL13. STAT6, a signal transducer and activator of transcription, has been shown to play a central role in mediating the immune regulatory signal of this cytokine. Recently, researcher found that the cytokine IL-4 plays a key role in development of innate CD8+ T cells in the thymus of several gene-deficient mouse strains, including Itk, KLF2, CBP and Id3, without previous exposure to antigen.