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Stimulation of gene expression by arsenite and gramicidin. HFFF2 monolayers were left untreated or pretreated with 100 μM sodium arsenite (As) or 12 μg/ml gramicidin D (Gm) for 2 h, washed, and infected with 105 PFU of in1382, with or without coinfection of 2 × 105 PFU of tsK. After incubation overnight at 38.5°C, monolayers were stained for the presence of β-galactosidase.
