Now, the third thing that must happen is once that fatty acid is inside the matrix of the mitochondria of that target cell, the fatty acid must be broken down into acetyl coenzyme A molecules. And this is what I'd like to focus on in this lecture. So I'd like to focus on the degradation, the breakdown of fatty acids into acetylcoenzone A molecules as it takes place in the matrix of the mitochondria of the target cell. So let's suppose our fatty acid, which is fully saturated and contains an even number of carbon atoms, actually makes its way into the matrix of the mitochondria of the target cell. What happens within the matrix? Well, within the matrix, we basically have a series of four reactions that basically take place.