Effect of rFIP-sch3 treatment on A549 and 293 cell viability.

<p>(a) A549 and 293 cells were treated with different concentrations of rFIP-sch3 (1, 2, 4, 8, 16, 32 and 64 μg/mL) for 24 h. Cell viability was measured using a CCK assay, and the half-maximal inhibitory concentration (IC₅₀) was calculated using SPSS 19 software. (b) Cytotoxicity comparison between rFIPs in A549 cells. A549 cells were treated with 8 μg/mL rFIPs for 24 h. * <i>p</i> < 0.05, and *** <i>p</i> < 0.001.