phosphoenolpyruvic acid carboxykinase

phos·pho·enol·pyr·u·vic ac·id car·box·y·kin·ase

an enzyme that catalyzes the reaction of oxaloacetate and GTP to form phosphoenolpyruvic acid, CO2, and GDP; a key enzyme in gluconeogenesis; the biosynthesis of this enzyme is decreased by insulin. Synonym(s): phosphoenolpyruvate carboxykinase