Enzymes for Calvin cycle located in the stroma.
1. Carbon dioxide combines with ribulose bisphosphate to form two molecules of glycerate-3-phosphate (a carboxylatio reaction catalysed by Rubisco enzyme) (carbon converted from inorganic form to organic form so also carbon fixation).
2. NADPH2 used to reduce the two glycerate-3-phosphate molecules into two molecules of triose phosphate. ATP hydrolysis provides energy for this reaction.
3. Most (5 out of 6) triose phosphate molecules are converted, by a series of reactions, back into RuBP. ATP supplies the required energy and phosphate.
4. Some (1 out of 6) of the triose phosphate molecules are rapidly convert to glucose, other carbs, amino acids, lipids and nucleic acids.
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