 Glucose 6-phosphate is converted to fructose 6-phosphate (F6P) and glyceraldehyde 3-phosphate (G3P) during glycolysis.Transketolase and transaldolase convert two molecules of F6P and one molecule of G3P to three molecules of R5P.During rapid cell growth, higher quantities of R5P and NADPH are needed for nucleotide and fatty acid synthesis, respectively.