Interleukin-13 (IL-13) is a cytokine produced by activated T lymphocytes which regulates the function of mouse macrophages and shares some biological functions with IL-4. Administration of mouse IL-13 to cultured mouse macrophages induces morphological changes (flattening, and development of processes), leads to increases in class II MHC antigen expression, and inhibits the synthesis of several proinflammatory cytokines (including IL-1β, IL-6, TNF, and IL-12). In contrast to human IL-13, mouse IL-13 does not appear to have activity for mouse B cells. Recombinant mouse IL-13 (mIL-13) has multiple glycosylated forms ranging in molecular weights from 11.3 to 15 kD, as detected by SDS-PAGE analysis.
Formulation and Purity:
Recombinant mouse IL-13 is supplied as a frozen aqueous buffered solution containing 1.0 mg/ml biotechnology grade, low endotoxin bovine serum albumin, with no preservatives. Recombinant mouse IL-13 is ≥95% pure, as determined by SDS-PAGE, and an absorbance assay based on the Beers- Lambert law. The endotoxin level is ≤0.1 ng per µg of mouse IL-13, as measured in a chromogenic LAL assay.