Figure 4From: Mutations within the conserved NS1 nuclear export signal lead to inhibition of influenza A virus replicationGrowth kinetics of the recombinant viruses in MDCK cells. MDCK cells on 6-well plates were infected at MOI values of 0.001 for 1 h after which virus inoculum was removed and fresh growth medium was added. The cells were incubated at 37°C humidified 5% CO2 conditions and supernatant samples were taken at 12 h intervals and analyzed by endpoint dilution on MDCK cells. Mean values from three independent experiments are shown for each sample.Back to article page