So pyruvate carboxylation connects or links Glycolysis to aerobic cell respiration by creating the Cecil coenzyme A molecule that can readily enter the first step of the citric acid cycle. And so in this lecture, I'd like to begin our discussion on the first step of the citric acid cycle. So what exactly is the first step? Well, once we form the cetil coenzyme A complex, it goes into the citric acid cycle and undergoes step one. And in step one, the ultimate goal is to combine the Cetal group of the cetil coenzyme A, the two carbon component, onto a four carbon component, a four carbon molecule found in the matrix of the mitochondria known as oxyloacetate. And this is the same oxyloacetate that we saw when we discussed Gluconeogenesis.