Figure 1.
The effect of PAB on the growth of A549 cells. (A) The chemical structure of PAB. (B) The cells were cultured for 24 h and then incubated with different concentrations of PAB for 1, 2, 3 and 4 d. Cell growth inhibition was determined by an MTT assay. Con: control. The data are presented as the mean±SD of three independent experiments.