Effects of STI571 on cell viability and apoptosis in Ba/F3 cells expressing TEL/ARG and untransfected Ba/F3 cells, as determined by annexin-PI staining.

(A) Eighteen-hour treatment of TEL/ARG-Ba/F3 cells with vehicle (left panel) or 1 μM STI571 (right panel). (B) Twenty-eight–hour treatment of TEL/ARG-Ba/F3 cells with vehicle (left panel) or 1 μM STI571 (right panel). (C) Twenty-eight–hour treatment of untransfected Ba/F3 cells with vehicle (left panel) or 1 μM STI571 (right panel). FITC indicates fluorescein isothiocyanate.