Figure 5 . Time course of D-tagatose production
from 100 g/L lactose and 122 g/L cheese whey powder (including 100 g/L
lactose) (A). Fermentation of mixed sugar syrup derived from lactose and
cheese whey powder by S. cerevisiae (B). Solid dots represent
lactose as substrate, and hollow dots represent whey powder as
substrate. Experiments were performed in triplicates, and error bars
represent the standard deviation.