So that means our NADH that is formed in Pyruvate decarboxylation and the citric acid cycle which both take place in the mitochondrial matrix each produce three ATP molecules while the NADH that is formed in the cytosol of our cell via glycolysis produces only two ATP molecules. And that's because we actually have to use a single ATP molecule per one NADH to transport that NADH from the cytoplasm to the mitochondrial matrix. Now, we also see that a single fadh two that is formed in the citric acid cycle produces two ATP molecules. And the process by which ATP synthase one of the enzymes of the electron transport chain phosphorylates ATP into ATP to produce our adenosine triphosphate is known as oxidative phosphorylation. So basically, when ATP molecules are produced without using the electron transport chain, as the case was in glycolysis and the citric acid cycle, that is known as substrate level phosphorylation but using the electron transport chain to produce ATP, that is known as oxidative phosphorylation. Now let's actually summarize our results by looking at the following table.