Functional model for polysaccharide hydrolysis and ethanol production in Chinese baijiu fermentation. G-1-P, glucose 1-phosphate; G-6-P, glucose 6-phosphate; F-6-P, fructose-6-phosphate; F-1,6-DP, fructose-1,6-diphosphate; G-3-P, 3-phospho glyceraldehyde; 6-P-gluconate, 6-phosphate-gluconate; ribulose-5-P, ribulose-5-phosphate; xylulose-5-P, xylulose-5-phosphate; acetyl-P, acetyl-phosphate. Enzymes: EC 3.2.1.1, alpha-amylase; EC 3.2.1.3, glucoamylase; EC 2.4.1.1, alpha-1,4 glucan phosphorylase; EC 4.1.1.1, pyruvate decarboxylase; EC 1.1.1.1, aldehyde-alcohol dehydrogenase; EC 1.2.4.1, pyruvate dehydrogenase; EC 2.3.1.12, acetyltransferase; EC 6.2.1.1, acetyl-coenzyme A (CoA) synthetase; EC 3.1.2.1, acetyl-CoA hydrolase; EC 1.2.1.3, aldehyde dehydrogenase; EC 1.1.1.27, l-lactate dehydrogenase; EC 2.7.2.1, acetate kinase; EC 2.3.1.8, phosphotransacetylase; EC 1.2.1.10, aldehyde-alcohol dehydrogenase.