Search Thermo Fisher Scientific
Search Thermo Fisher Scientific
RRIL410 contains 121 amino acid residues. Endotoxin level is <1 EU/ug.
Purity: >98% pure by SDS-PAGE analyses.
Activity: The ED50 is <1.5 ng/mL, as determined in a stimulation of proliferation of rat spleen cells, corresponding to a specific activity of 6.6 x 10^6 units/mg.
Use: Rat IL-4 exerts activity in the range of 0.1 to 10 ng/mL for most in vitro applications.
Reconstitution and Dilution: Reconstitute in distilled water to a concentration of 1 mg/mL. After reconstitution, dilute cytokine in a neutral buffer containing carrier protein such as 5-10% FBS or 1-4% high purity BSA (fatty acid free fraction V).
Lyophilized product is stable until expiration if stored desiccated below 0ºC. Cytokines diluted as indicated above should be divided into aliquots and stored at -70ºC. Recombinant proteins should be stored at concentrations >500 ng/mL to reduce loss of activity.
Interleukin-4 (IL-4) is a pleiotropic, immune-modulatory cytokine produced by activated T cells, and serves as a ligand for interleukin 4 receptor. IL-4 has been found to have the broadest range of actions. 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 an important role in mediating the immune regulatory signal of IL-4. The IL-4 gene, IL-3, IL-5, IL-13, and CSF2 form a cytokine gene cluster on chromosome 5q. In particular, IL-4 is located in close proximity to IL13 on the chromosome. Further, the IL-4 gene, IL13 and IL5 are found to be coordinated by several long-range regulatory elements over a 120 kilobase range on the chromosome. IL-4 delta 2 is a known splice variant of IL-4.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
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