Enzymatic Activity
As shown in Figure 2 (left), RuBisCO is one of many enzymes in the Calvin cycle.
Substrates. During carbon fixation, the substrate molecules for RuBisCO are ribulose-1,5-bisphosphate, carbon dioxide (distinct from the "activating" carbon dioxide). RuBisCO also catalyses a reaction between ribulose-1,5-bisphosphate and molecular oxygen (O2) instead of carbon dioxide (CO2).
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