The dose-response curves of STI571 against KU812, K562, TCC-S, and TCC-Y cells.

Cell growth inhibition was measured using the MTT assay after 5 days for KU812, K562, and TCC-S cells or after 7 days for TCC-Y cells and was plotted as a percentage of the control (cells not exposed to drugs). Each point represents the mean ± SEM for at least 3 independent experiments.