Fig. 4From: Changes in RNA secondary structure affect NS1 protein expression during early stage influenza virus infectionMulti-cycle growth curves of assembled viruses featuring different NS RNA structures. MDCK (a), Vero (b), and A549 (c) cells were infected at moi = 0.001 TCID50/cell. The infectious activity of virus progeny was measured at the indicated time points by TCID50 assay. Error bars represent mean ± SD (n = 3)Back to article page