Interleukin-4 is a pleiotropic cytokine that regulates diverse T and B cell responses including cell proliferation, survival and gene expression. Produced by mast cells, T cells and bone marrow stromal cells, IL-4 regulates the differentiation of naive CD4+ T cells into helper Th2 cells, characterized by their cytokine-secretion profile that includes secretion of IL-4, IL-5, IL-6, IL-10, and IL-13, which favor a humoral immune response. Another dominant function of IL-4 is the regulation of immunoglobulin class switching to the IgG1 and IgE isotypes. Excessive IL-4 production by Th2 cells has been associated with elevated IgE production and allergy.
Molekulargewicht:
Approximately 13.5 kDa, a single non-glycosylated polypeptide chain containing 120 amino acids.
Quelle:
Escherichia coli.
Reinheit:
>96% by SDS-PAGE and HPLC analyses.
Formulierung:
Sterile Filtered White lyophilized (freeze-dried) powder.
Lyophilized from a 0.2mm filtered solution in PBS, pH 7.4.
Anwendungsbeschreibung:
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in 10mM HAc to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at <-20C. Further dilutions should be made in appropriate buffered solutions.
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