Figure 1: Detailed diagram of the cell-free system for biohydrogen production from cellobiose used by Ye et al. [5]. G1P, glucose-1-phosphate; G6P, glucose-6-phosphate; 6PG, 6-phosphogluconate; Ru5P, ribulose-5- phosphate; Pi, inorganic phosphate; R5P, ribose-5-phosphate; X5P, xylulose-5-phosphate; S7P, sedoheptulose- 7-phosphate; E4P ́erythrose-4-phosphate; G3P, glyceraldehyde-3- phosphate; DHAP, dihydroxyacetone phosphate; F6P, fructose-6- phosphate; FDP, fructose-1,6-phosphate; #1,cellobiosephosphorylase; #2, phosphoglucomutase; #3, G-6-P dehydrogenase; #4, 6-phosphogluconate dehydrogenase ; #5 Phosphoriboseisomerase; #6, Ribulose 5-phosphate epimerase; #7, Transaldolase; #8, Transketolase; #9, Triose phosphate isomerase; #10, Aldolase, #11, Phosphoglucoseisomerase; #12, Fructose-1, 6-bisphosphatase; #13, NADP(+) hydrogen dehydrogenase.