产品介绍
PBL Assay Science
11420-1
Human IFN Beta 1b, E.Coli
1 x 105 units
20 kDa
cDNA obtained from human fibroblast interferon beta mRNA expressed in E.coli
> 95% by SDS-PAGE stained by Coomassie Blue Endotoxin level < 1 EU/μg
Measured using a cytopathic inhibition assay on human lung carcinoma cell line A549 with encephalomyocarditis virus (EMCV). EC50 for IFN beta 1b in this assay is ~ 1 U/ml
153 mM NaCl, 1.3% Normal Serum Albumin
< 1 EU/μg
≥ 95%
For retention of full activity store at -70 oC or below and avoid repeated freeze-thaw cycles
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