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Photorespiration and the C4 Cycle

Photorespiration and the C4 Cycle
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Description: Ribulose bisphosphate carboxylase is a peculiar enzyme.

Under normal environmental conditions, it can behave as an oxygenase as well as a carboxylase.

In the oxygenase reaction, it is proposed that the enediolate intermediate nucleophilically attacks O2 instead of CO2.

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Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=34001
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