cellulose Cellulose 67 lignin 44 Lignin 32 Biomass 31 biomass 30 biofuel 25 Article 24 Saccharification 24 hydrolysis 24 chemistry 23 enzyme activity 22 Enzymatic hydrolysis 19 Lignocellulosic biomass 18 controlled study 15 enzyme 15 Enzymes 14 fermentation 14 Biofuels 13 Ethanol 13 Yeast 13 unclassified drug 13 Cellulose derivatives 12 Enzymolysis 12 Glucose 12 fungus 12 Fermentation 11 Genes 11 Cellulosic ethanol 10 Substrates 10