Phosphoenolpyruvate | chemical compound | Britannica (original) (raw)

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metabolism

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  In metabolism: The formation of ATP
  … reacts with 2-phosphoglycerate to form phosphoenolpyruvate (PEP), water being lost from 2-phosphoglycerate in the process. Phosphoenolpyruvate acts as the second source of ATP in glycolysis. The transfer of the phosphate group from PEP to ADP, catalyzed by pyruvate kinase [10], is also highly exergonic and is thus virtually irreversible under…
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  In metabolism: Coarse control
  …pyruvate or substances catabolized to PEP or pyruvate are added to the medium, however, further synthesis of the two enzymes is speedily repressed.
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photosynthesis

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  In photosynthesis: Carbon fixation in C4 plants
  …added to the three-carbon acid phosphoenolpyruvate (PEP) by an enzyme called phosphoenolpyruvate carboxylase. The product of this reaction is the four-carbon acid oxaloacetate, which is reduced to malate, another four-carbon acid, in one form of the C4 pathway. Malate then is transported to bundle-sheath cells, which are located near the…
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