Antiviral activity of peptides. (A) MDCK cells were inoculated with untreated HK/483 virus or HK/483 treated with increasing concentrations of TAT-C (•), n50,51TAT-C (○), EB (▪), or EBX (□), and cell death was determined by Promega CellTiter assay at 48 hpi. Samples are compared and normalized to measurements of virus alone (100% lethal). The results represent the means ± standard deviations of triplicate determinations. *, statistical significance (P < 0.01). (B) MDCK cells were inoculated with untreated HK/483 virus (0 value) or EB (▪)- or EBX (□)-treated HK/483 virus, and viral titers were determined on supernatants 72 hpi. The results represent the means ± standard deviations of triplicate determinations. *, statistical significance (P < 0.01).