Reorganization of the actin cytoskeleton in
NRK/ras cells upon treatment with PD098059. NRK/ras cells were treated
with 0.1% DMSO (a) or 50 μM PD098059 for 10 h (b), 24 h
(c), 48 h (d), or 72 h (e), then fixed and stained with
Oregon green-conjugated phalloidin. Untransformed NRK cells are shown
in (f) for comparison. Bar, 20 μm.