Fig. 6. Quantification of in vitro anti-influenza activity of mTG-23. The effect of mTG-23 on the post-infection cell viability of (A) A549 and (B) MDCK cells after 48 hours of infection was determined by the MTT assay. Cell viability was normalized to control and represents mean ± S.E. of at least 3 sets. Protection from CPE was normalized as described in the viral infectivity and peptide efficacy assay section and fitted to a dose–response curve for (C) A549 and (D) MDCK cells. See the viral infectivity and peptide efficacy assay for details.