FIG. 3.

Laccase activities in cultures of S. cerevisiae transformants L⁺ (triangles) and L⁺S^s (diamonds) in shake flasks under aerobic conditions (50 ml of medium in 500-ml shake flasks) (open symbols) and oxygen-limited conditions (400 ml of medium in 500-ml shake flasks) (shaded symbols) and in a fermentor under oxygen-limited conditions (solid symbols). The initial pH of each of the fermentations was 5.5. The pH was maintained at pH 5.5 in the fermentor but not in the shake flasks. OD₆₂₀ optical density at 620 nm.