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19.7 kDa

DNA sequence encoding the mature mouse IL-28B/IFN-λ3 expressed in E.coli

Greater than 95%
Endotoxin level <  1 EU/μg

Human HepG2 cells infected with encephalomyocarditis virus.
The ED50 is 7.5 - 37.5 ng/ml.

Phosphate-buffered saline (PBS) containing 50 μg of BSA per 1 μg of cytokine

< 1 EU/μg

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