Pentose Phosphate Pathway Definition and Mechanism Pentose Phosphate Pathway Protects E. coli from Antibiotic Lethality bioRxiv Pentose Phosphate Pathway Reactions in Photosynthesizing Cells Glucose metabolism begins with its transport into cells via GLUT transporters, where it is phosphorylated to glucose 6 phosphate (Glucose 6 P). This molecule can enter various pathways, including the pentose phosphate pathway or hexosamine biosynthesis. The NADPH Link between the Renin Angiotensin System and the Antioxidant Mechanisms in Dopaminergic Neurons