In the carbon fixation step of the Calvin cycle,ribulose-1,5-bisphosphate (a five-carbon compound)is carboxylated to produce

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In the carbon fixation step of the Calvin cycle, ribulose-1,5-bisphosphate is carboxylated by the enzyme Rubisco using carbon dioxide to produce two molecules of 3-phosphoglycerate, which are both three-carbon compounds. This is the first step in the production of glucose through the cycle, but glucose itself is not directly produced in this step.

In the Carbon Fixation Step of the Calvin Cycle,ribulose-1,5-Bisphosphate (A