Fig. 2.
Activation of v-Abl TK prevents reduction in Ψm after withdrawal of IL-3. (A [i]) Viable cells were defined in region R1 by exclusion of propidium iodide. (A [ii]) Example of the measurement of Ψm in IC.DP cells (0 hours) using DiOC(6)3 (solid histogram) and collapse of Ψm with 10 μmol/L mCCCP (open histogram). (B) Kinetics of changes in Ψm in IC.DP (squares) and IC2.9 (triangles) cells after withdrawal of IL-3. Cells were maintained at either 32°C (open symbols) or 39°C (solid symbols). Data were normalized against the mean DiOC(6)3 fluorescence intensity for each sample at 0 hours. Data points are the mean ± SEM of three duplicate experiments.