Now the second important difference is the molecule citrate. So citrate, as we'll see in just a moment, just like ATP molecules is another example of an allosteric inhibitor to phosphor fructosekinase. So let's suppose in our liver cells we have a high oxygen content but we don't have many ATP molecules. Well if we don't have many ATP molecules then the glycosis process will continue and will form many ATP molecules and also Pyruvate molecules. And because where under aerobic conditions the peruvate will essentially enter the mitochondria and carry out the citric acid cycle. Now one of the initial intermediates of the citric acid cycle is a molecule known as citrate and citrate is ultimately formed from the pyruvate molecule that enters that mitochondria.