Describe what happens during the regeneration stage of the calvin cycle

During the regeneration stage of the calvin cycle:

- The remaining glyceraldehyde three-phosphate (G3P) molecules are converted into ribulose biphosphate (RuBP), a five carbon sugar that is combined with CO2

- The reaction is speeded up by RuBP carboxylase (rubisco), an enzyme that catalyzes the combination of CO2 and RuBP