Schematic drawing of metabolic pathways of pentoses and erythritol in T. reesei . Metabolites are given in boxes. Monomeric sugars derived from hydrolytic lignocellulose degradation by T. reesei are given in orange. The target substance, erythritol, is given in purple. Enzyme names and EC numbers are given in green. Adjacent pathways are indicated in blue. Dashed arrows indicate (possible) involvement of more than one enzyme.