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19.6 kDa

Gene obtained from mouse DNA expressed in mammalian cells

> 95% by SDS-PAGE stained by Coomassie Blue
Endotoxin level < 1 EU/μg

Measured using a cytopathic effect inhibition assay on Mouse (L929) cells with EMCV
EC50 for IFN Beta is ~ 2.5 U/ml

20 mM Sodium Phosphate, pH 6.4; 300 mM NaCl; 5% Glycerol; 0.1% bovine serum albumin (BSA)

< 1 EU/μg

Purified from mammalian tissue culture media by a combination of ion exchange, hydrophobic interaction and size exclusion chromatography.

For retention of full activity store at -70 oC or below and avoid repeated freeze-thaw cycles