Pentose Phosphate Pathway on the MCAT MedLife Mastery Pentose Phosphate Pathway: ditki medical and biological sciences 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. Quantitative Importance of the Pentose Phosphate Pathway Determined by Incorporation of 13C from [2 13C] and [3 13C]Glucose into TCA Cycle Intermediates and Neurotransmitter Amino Acids in Functionally Intact Neurons Eva M F Potential positive feedback loop involving the pentose phosphate Download Scientific Diagram Pentose phosphate pathway: phases, reactions, & metabolic roles