The Electron Transport Chain and Pentose Phosphate Pathway biochemistry 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 pentose phosphate pathway: An antioxidant defense and a crossroad in tumor cell fate ScienceDirect Overview of Pentose Phosphate Pathway Creative Proteomics Pentose Phosphate Pathway (PPP), Purine and Pyrimidine Metabolism Cell Biology, Genetics, and Biochemistry for Pre Clinical Students