Now, under aerobic conditions, when we have oxygen inside our cells, what will happen to that pyruvate is it will enter the mitochondrion of that cell. And once the pyruvate enters the mitochondrion, as we'll see in the next several Electras, that pyruvate undergoes a decorboxylation reaction in which we oxidize the pyruvate to form acetylcoand A and we release CO2 molecule and we collect two electrons. Again, those two electrons are picked up by an NAD plus to form NADH. So here we have one NADH. Here we have two NADH molecules. And instead of using the NADH, I simply represent them as electrons.