Growth curves (in microplates) of Z. rouxii strains UL4 (▲), F1 (Zrffz1Δ) (◇), F2 (Zrffz2Δ) (□), F1F2 (Zrffz1Δ Zrffz2Δ) (○), and F1F2S1 (Zrffz1Δ Zrffz2Δ Zrfsy1Δ) (△) in YNB medium supplemented with 0.05% (A), 0.1% (B), and 2% (C) fructose or 2% glucose (D). The data are representative of at least two independent experiments.