In the reduction of CO2 during C4 photosynthesis, which of the following initially combines with CO2?

Name: In the reduction of CO2 during C4 photosynthesis, which of the following initially combines with CO2?
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In C4 photosynthesis, the first step is the fixation of CO2 into a 4-carbon compound called oxaloacetate, which is catalyzed by the enzyme PEP carboxylase. PEP (phosphoenolpyruvate) is the molecule that initially combines with CO2 to form oxaloacetate.

In the Reduction of CO2 During C4 Photosynthesis, Which of the Following