And the citric acid cycle can actually help generate the high energy ATP molecules. So once again, once the fully saturated fatty acid that contains an even number of carbon atoms makes its way into the matrix of the mitochondria in the acylcoemsi form and then undergoes a series of four reactions that ultimately shorten the carbon chain by two and release an acetylcoenzine a molecule and this process recurs within the matrix of the mitochondria. It takes place over and over and over until the fatty acid is fully broken down into these acetyl coenzyme a molecule. So what exactly are these four steps? Well, step one is the oxidation step. It's an oxidation by specific type of molecule we call Fad, where Fad stands for Flavin adenine dinucleotide.