Figure 3: Effect of apple components on the oxidative stress resistance. Viability of the MCY4/Kllsm4Δ1 strain was measured after exposure of cells to H2O2 at the indicated concentration for 4 h in the presence of acetone (control) or extracts from whole apple, skin, flesh, and polyphenolic fractions. Average and standard deviations, obtained from three independent experiments, are indicated.