Abbreviation
Recombinant Mouse Il4 protein (Active)
Purity
>97% as determined by SDS-PAGE.
Endotoxin
Less than 1.0 EU/μg as determined by LAL method.
Activity
Fully biologically active when compared to standard. The ED50 as determined by the dose-dependant prolifiration of Murine HT-2 cells is less then 2 ng/ml, corresponding to a Specific Activity of >5x105 IU/mg.
Alternative Names
Il4; Il-4Interleukin-4; IL-4; B-cell IgG differentiation factor; B-cell growth factor 1; B-cell stimulatory factor 1; BSF-1; IGG1 induction factor; Lymphocyte stimulatory factor 1
Species
Mus musculus (Mouse)
Expression Region
21-140aa
Target Protein Sequence
M+HIHGCDKNH LREIIGILNE VTGEGTPCTE MDVPNVLTAT KNTTESELVC RASKVLRIFY LKHGKTPCLK KNSSVLMELQ RLFRAFRCLD SSISCTMNES KSTSLKDFLE SLKSIMQMDY S
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 , PBS, pH 7.4
Lead Time
5-10 business days
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
Interleukin-4 is a pleiotropic cytokine central to Th2 polarization, B-cell class switching to IgG1, and alternative macrophage activation, making it indispensable in murine immunology research. This tag-free recombinant mouse IL-4 encompasses the full-length mature sequence (residues 21–140) and demonstrates strong signaling potency, with an ED50 below 2 ng/ml in a murine HT-2 cell proliferation assay corresponding to a specific activity exceeding 5 × 10⁵ IU/mg — providing a reliable basis for dose-dependent functional assays, JAK/STAT signaling pathway studies, and Th2 differentiation experiments. Endotoxin levels below 1.0 EU/μg minimize the risk of LPS-driven artifacts that can confound readouts in primary T-cell and B-cell cultures, macrophage polarization assays, and in vivo inflammation models. Purity exceeding 97% by SDS-PAGE further supports use as a reference standard in cytokine detection assays or as a positive control for ELISA-based antibody validation.