D-Xylulose

D-Xylulose 5-phosphate (sodium) is a pentose phosphate ester and an essential intermediate metabolite in the pentose phosphate pathway (PPP) and the non-oxidative phase of the pentose phosphate pathway. D-xylulose-5-phosphate can be efficiently synthesized through the phosphorylation of D-xylulose catalyzed by D-xylulokinase (XKS1 from Saccharomyces cerevisiae), with ATP regeneration facilitated by the phosphoenolpyruvate (PEP)/pyruvate kinase (PK) system[1].