Figure 23.5 Stoichiometry of the Calvin cycle. The diagram shows the reactions necessary with the correct stoichiometry to convert three molecules of CO₂ into one molecule of dihydroxyacetone phosphate (DHAP). Two molecules of DHAP are subsequently converted into a member of the hexose monophosphate pool, shown here as fructose 6-phosphate. The cycle is not as simple as presented in Figure 23.1; rather, it entails many reactions that lead ultimately to the synthesis of glucose and the regeneration of ribulose 1,5-bisphosphate.