IL4 (Human) Recombinant Protein
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Specification
Regulatory Status
RUO grade
Product Description
Human IL4 recombinant protein with His tag at the C-terminus expressed in Escherichia coli.
Host
Escherichia coli
Theoretical MW (kDa)
Calculated MW: 15.9
Form
Lyophilized
Preparation Method
Escherichia coli expression system
Purity
> 98% by SDS-PAGE
Endotoxin Level
< 0.1 EU/ug
Activity
The ED50 for this effect is < 0.2 ng/mL, measured by its ability to induce TF-1 cells proliferation. The specific activity of recombinant human IL-4 is approximately > 1 x 107 IU/mg.
Recommend Usage
SDS-PAGE
The optimal working dilution should be determined by the end user.Storage Buffer
Lyophilized from PBS, pH 8.0.
Reconstitute the lyophilized protein in sterile H2O to a concentration of at least 200 ug/mL and incubate the stock solution for at least 20 min to ensure sufficient redissolution. Please use the protein within one month after reconstitution.Storage Instruction
Store at -20°C for 12 months in lyophilized state.
After reconstitution with deionized water, store at -20 or -80°C for 1 month.
Aliquot to avoid repeated freezing and thawing. -
Applications
Functional Study
SDS-PAGE
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Gene Info — IL4
Entrez GeneID
3565Gene Name
IL4
Gene Alias
BCGF-1, BCGF1, BSF1, IL-4, MGC79402
Gene Description
interleukin 4
Omim ID
147780Gene Ontology
HyperlinkGene Summary
The protein encoded by this gene is a pleiotropic cytokine produced by activated T cells. 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. This gene, IL3, IL5, IL13, and CSF2 form a cytokine gene cluster on chromosome 5q, with this gene particularly close to IL13. This gene, IL13 and IL5 are found to be regulated coordinately by several long-range regulatory elements in an over 120 kilobase range on the chromosome. Two alternatively spliced transcript variants of this gene encoding distinct isoforms have been reported. [provided by RefSeq
Other Designations
B cell growth factor 1|B_cell stimulatory factor 1|lymphocyte stimulatory factor 1
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