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Effect of PEDV infection in the presence of Z-IETD-FMK and Z-DEVD-FMK. At the different concentrations after PEDV infection 48 h, culture supernatants were harvested and viral titers were measured. The data shown are the means ± SEM of three independent experiments for each protocol. “*”, P < 0.05; “**”, P < 0.01.
