Fig. 5From: Reducing glucoamylase usage for commercial-scale ethanol production from starch using glucoamylase expressing Saccharomyces cerevisiaeEffect of metal ions on the cell wet weight and ethanol content of glucoamylase expressing strain CIBTS1522. The influence of MgSO4 (a), ZnSO4 (b), KCl (c), NaCl (d), FeSO4 (e), CuSO4 (f), CaCl2 (g), and MnSO4 (h) were shown. Error bars represent the standard deviation from the mean of three replicatesBack to article page