The substrate for the glycolytic enzyme glyceraldehyde 3-phosphate dehydrogenase is glyceraldehyde 3-phosphate (with one phosphate group) while its product is 1,3-bisphosphoglycerate (with two phosphate groups). Where does the extra phosphate group come from?
A) From combining two molecules of the substrate B) ATP C) Fructose 1,6-bisphosphate D) Pᵢ E) NADH