Phosphoenolpyruvate ( PEP ) is carboxylated by the enzyme PEP carboxylase to form oxaloacetate .
Phosphoenolpyruvate ( PEP ) is a glycolysis pathway intermediate .
Phosphoenolpyruvate ( PEP ) , a glycolysis pathway intermediate , is carboxylated by the enzyme PEP carboxylase to form oxaloacetate .