The calvin cycle uses ATP and NADPH, the byproducts of photosynthesis' light reactions.
NADPH and ATP are the byproducts of the light reactions of photosynthesis that are used in the Calvin cycle. Sunlight raises the energy level of photosystem II electrons during the light reactions. As the electrons move along the electron transport chain, a gradient of hydrogen ions is produced.
Each produces a triose phosphate (C₃H₇O₆P) molecule after consuming one ATP and one NADPH molecule. The cycle generates triose phosphates, of which one-sixth is used in pathways for the synthesis of carbohydrates. The remaining triose phosphates are retained and go through the regeneration phase.
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