Formulation

Supplied frozen in phosphate-buffered saline (PBS)

Molecular Weight

19.6 kDa

Source

Gene was obtained from mouse DNA expressed in E. coli modified as described in Day, et al. (1992)
"Engineered disulfide bond greatly increases specific activity of recombinant murine interferon beta" ( J. Interferon Res. 12: 139-43)

Purity

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

Bioactivity

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

Storage

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

Synonyms

Mouse Beta IFN, Mouse Beta Interferon, Mouse IFN Beta, Mouse IFNB, Mouse Type I IFN beta, Mouse Fibroblast IFN, Mouse Fibroblast Interferon, Mouse Type I Interferon Beta