sake yeast; Aspergillus oryzae; β-glucosidase; endoglucanase; cell surface engineering; cellulosic materials
Ethanol from biomass is called bioethanol, a substitute for fossil fuels (1). Particularly, cellulosic biomass, such as agricultural and forestry residues, exists in huge quantities and is remarkable because it is not a food material. Ethanol production from cellulose is performed via the degradation of cellulose to cellooligosaccharides and glucose, followed by the conversion of glucose to ethanol by microorganisms such as yeast.