Figure 7
Schematic diagram of (A) construction of mutant E. coli strain BL21 (DE3) ∆xylAB, p21XR and (B) its plausible metabolic pathway for xylitol production from xylose-based hydrolysate. Xlu-5P, xylulose-5-phosphate; G6P, glucose 6-phosphate; PEP, phosphoenolpyruvate; PGK, phosphoglycerate kinase; PCK, phosphoenolpyruvate carboxykinase; PK, pyruvate kinase; MDH, malate dehydrogenase; FR, fumarate reductase; PDH, pyruvate dehydrogenase; FL, pyruvate-formate lyase; FDH, formate dehydrogenase; AK, acetate kinase; ADH, alcohol dehydrogenase; XR, xylose reductase68,69.
