2.2. Enzymes and yeast strain
Cellic CTec3 enzyme (Novozymes, Denmark) was used for the
hydrolysis. A flocculating strain of yeast S. cerevisiae CCUG 53310
(Culture Collection University of Gothenburg, Sweden) was used
in the experiments. The yeast was maintained at 4 C on YPD agar
plate containing 20 g/L agar (Scharlau), 20 g/L D-glucose (Scharlau),
10 g/L yeast extract (Scharlau) and 20 g/L peptone (Fluka). Prior to
fermentation, 100 mL preculture in YPD medium containing 20 g/L
D-glucose, 20 g/L peptone and 10 g/L yeast extract in 250 mL flask
was provided. This was incubated in a shaking water bath (Grant
OLS 200, Grant instrument Ltd, UK) at 121 rpm and 30 C for 24 h.