Interleukin 13, Recombinant, Human (IL-13)

IL-13 is an immunoregulatory cytokine produced primarily by activated Th2 cells, and also by mast cells and NK cells. Targeted deletion of IL-13 in mice resulted in impaired Th2 cell development and indicated an important role for IL-13 in the expulsion of gastrointestinal parasites. IL-13 exerts anti-inflammatory effects on monocytes and macrophages and it inhibits the expression of inflammatory cytokines such as IL-1beta, TNF-alpha, IL-6 and IL-8. IL-13 has also been shown to enhance B cell proliferation and to induce isotype switching resulting in increased production of IgE. Blocking of IL-13 activity inhibits the pathophysiology of asthma. \n\nBiological Activity: Fully biologically active when compared to standard. The ED50 as determined by the dose-dependent proliferation of TF-1 cells was < 1.0ng/ml, corresponding to a specific activity of > 1 x 10e6 units/mg.\n\nEndotoxin: (same/less than)1EU/ug as determined by LAL method.\n\nStorage and Stability:\nAliquot to avoid repeated freezing and thawing and freeze at -70 degrees 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.

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SPECIFICATIONS

Catalog Number

I7663-07P

Size

2ug

Form

Supplied as a lyophilized powder in PBS, pH 7.5. Reconstitute in sterile distilled water or aqueous buffer containing 0.1% BSA to a concentration of 0.1-1mg/ml.

Purity

~96% by SDS-PAGE and HPLC analyses.