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You are here:Home » Molecular Biology » Growth Factors-Interleukin » Interleukin 3, Recombinant, Human (IL-3)

Interleukin 3, Recombinant, Human (IL-3)

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Specifications

Interleukin 3 is a pleiotropic factor produced primarily by activated T cells that can stimulate the proliferation and differentiation of pluripotent hematopoietic stem cells as well as various lineage committed progenitors. In addition, IL-3 also affects the functional activity of mature mast cells, basophils, eosinophils and macrophages. Because of its multiple functions and targets, it was originally studied under different names, including mast cell growth factor P-cell stimulating factor, burst promoting activity, multicolony stimulating factor, thy-1 inducing factor and WEHI-3 growth factor. In addition to activated T cells, other cell types such as human thymic epithelial cells, activated murine mast cells, murine keratinocytes and neurons/astrocytes can also produce IL-3. At the amino acid sequence level, mature human and murine IL-3 share only 29% sequence identity. Consistent with this lack of homology, IL-3 activity is highly species-specific and human IL-3 does not show activity on murine cells.
Catalog #I7663-35G
Biological ActivityFully biologically active when compared to standard. The ED50 as determined by the dose-dependent stimulation of the proliferation of human TF-1 cells is 0.1ng/ml, corresponding to a Specific Activity of 1.0 x 10e7 IU/mg.
Endotoxin 1EU/ug as determined by LAL method.
Storage and StabilityAliquot to avoid repeated freezing and thawing and freeze at -70°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Aliquots are stable for at least 12 months.
Molecular Weight15 kD
SourceEscherichia coli
Purity~97% by SDS-PAGE and HPLC analyses.
Concentration1mg/ml
FormSupplied as a lyophilized powder in PBS, pH 7.4. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1mg/ml.
Important NoteThis product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.


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