Fig 3. Effect of the cell-permeable FPT on cell proliferation and cell viability in HeLa cells.

A) Cell proliferation was determined by direct cell counting at the indicated time intervals after treatment with (solid circle) or without (open circle) 0.01 w/v% FPT. The Y-axis indicates the cell number relative to the number at 1 h after incubation. B) Cell viability was determined by staining with propidium iodide (PI) as a marker of cell death at 1, 3 or 6 h after treatment with 0.01 w/v% FPT. The percentages of cells lacking PI-staining out of all counted cells are shown. The vertical bars indicate the s.d. based on three independent experiments.