Abbreviation
Recombinant Human IL4 protein (Active)
Purity
Greater than 95% as determined by SDS-PAGE.
Endotoxin
Less than 0.01 EU/µg as determined by LAL method.
Activity
The ED50 as determined in a cell proliferation assay using TF‑1 human erythroleukemic cells is 0.01-0.05 ng/ml.
Alternative Names
B cell growth factor 1; B cell IgG differentiation factor; B Cell Stimulatory Factor 1; B-cell stimulatory factor 1; BCGF 1; BCGF1; Binetrakin; BSF-1; BSF1 ; IGG1 induction factor; IL 4; IL-4; IL4; IL4_HUMAN; Il4e12; Interleukin 4; Interleukin 4 variant 2; Interleukin 4; isoform 1 ; Interleukin-4; Lymphocyte stimulatory factor 1; MGC79402; Pitrakinra
Species
Homo sapiens (Human)
Expression Region
25-153aa
Target Protein Sequence
HKCDITLQEIIKTLNSLTEQKTLCTELTVTDIFAASKNTTEKETFCRAATVLRQFYSHHEKDTRCLGATAQQFHRHKQLIRFLKRLDRNLWGLAGLNSCPVKEANQSTLENFLERLKTIMREKYSKCSS
Note: The complete
sequence may include tag sequence, target protein sequence, linker sequence and extra sequence that is
translated with the protein sequence for the purpose(s) of secretion, stability, solubility, etc.
If the exact amino acid sequence of this recombinant protein is critical to your application,
please explicitly request the full and complete sequence of this protein before ordering.
Protein Length
Full Length of Mature Protein
Tag Info
Tag-Free
The tag type will be determined during production process. If you have specified tag type, please tell us and we will develop the specified tag preferentially.
Buffer
Lyophilized from a 0.2 μm filtered 20 mM PB, 150 mM NaCl, pH 7.4
Lead Time
Basically, we can dispatch the products out in 5-10 working days after receiving your orders. Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Note: All of our proteins are default shipped with normal blue ice packs, if you request to ship with dry ice, please communicate with us in advance and extra fees will be charged.
Notes
Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Shelf Life
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Datasheet & COA
Please contact us to get it.
Description
IL-4 drives Th2 polarization, B-cell class switching, and alternative macrophage activation, making it indispensable for dissecting JAK1/STAT6 signaling and immune cell differentiation. This tag-free recombinant human IL-4, encompassing the full mature sequence (aa 25–153) produced in mammalian cells, demonstrates exceptional potency with an ED50 of 0.01–0.05 ng/mL in TF-1 proliferation assays, confirming reliable dose-dependent activity at sub-nanogram concentrations. Endotoxin levels below 1.0 EU/μg eliminate LPS-driven artifacts, which supports use in sensitive primary cell cultures such as naïve T-cell differentiation, B-cell activation, and monocyte-to-macrophage polarization studies. Purity exceeding 95% by SDS-PAGE, combined with this stringent endotoxin control, provides a suitable basis for applications including STAT6 phosphorylation kinetics, in vivo Th2-driven inflammation models, cytokine detection assay standardization, and antibody validation by ELISA.