her molecules, such as acetyl groups ??? ??? ??? acetyl CoA a molecule produced by oxidation of pyruvate (the final product of glycolysis) in a reaction catalyzed by pyruvate dehydrogenase. can enter the citric acid cycle and is used as a carbon source in the synthesis of fatty acids, steroids, and other compounds ??? ??? ??? pyruvate dehydrogenase a large enzyme complex, located in the mitochondr