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20,027 Da

Bovine gene for interferon tau 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 bovine MDBK cells with vesicular stomatitis virus (VSV)

Phosphate buffered saline (PBS) containing 0.1% bovine serum albumin (BSA)

< 1 EU/μg

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