DESCRIPTION

Interleukin-4 (IL-4) is a species-specific cytokine which promotes the proliferation, differentiation and cell-surface protein modulation of B lymphocytes. IL-4 is responsible for activities previously assigned to BCGF, BCDF, BSF-2 and TCGF-2. Mouse IL-4 is a 14 kD protein containing 120 amino acid residues. Recombinant mouse IL-4 (Cat. No. 550067) is supplied as a frozen liquid comprised of 0.22 µm sterile-filtered aqueous buffered solution, glycerol and bovine serum albumin, with no preservatives. Recombinant mouse IL-4 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/µg of mouse IL-4, as measured in a chromogenic LAL assay.

PREPARATION AND STORAGE

Store product at -80°C prior to use or for long term storage of stock solutions. Rapidly thaw and quick-spin product prior to use. Avoid multiple freeze-thaws of product. This preparation contains no preservatives, thus it should be handled under aseptic conditions.

PRODUCT NOTICES

Since applications vary, each investigator should titrate the reagent to obtain optimal results.

Source of all serum proteins is from USDA inspected abattoirs located in the United States.

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