FIG 4.
Stress susceptibility of the whi2Δ mutant versus that of the wild-type strain S. cerevisiae BY4741 to acetic acid. Cells in exponential growth phase in minimal medium were treated with acetic acid (4 g/liter [pH 4.0]), and the CFU were counted as a function of time. The results are the means from triplicate experiments; error bars represent standard deviations.