Phosphoenolpyruvate

Abbreviation: PEP

A monocarboxylic acid that is an intermediate in both glycolysis and gluconeogenesis. Synthesized from oxaloacetic acid by the enzyme phosphoenolpyruvate carboxykinase and converted to pyruvate by the enzyme pyruvate kinase. Can also be reversibly synthesized from or converted to 2-phosphoglycerate by the enzyme enolase.