Ribulose-1,5-bisphosphate
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Ribulose-1,5-bisphosphate (RuBP) is an important intermediate in the Calvin cycle taking place during photosynthesis. It is the substrate used by the enzyme RuBisCO to fix carbon dioxide to create two molecules of Glycerate-3-phosphate (GP), this is then reduced in the Calvin Cycle.Ribulose-1,5-bisphosphate is regenerated in the Calvin Cycle using ATP from the light-dependent reactions of photosynthesis