And so, when the blood glucose level is low, the low affinity of the glucokinase for glucose, remember, glucokinase is 50 times less likely to bind to glucose than hexaginase is found in other cells. So muscle cells and brain cells. And so that basically ensures that the hexokinases of the brain and the muscle cells get that glucose first, because under these conditions of, let's say, starvation, the liver function isn't as important as the muscle function and the brain function that will allow us to actually get to that food source and ingest those carbohydrates, those sugar molecules. So these are the two important reasons for why we have the glucokinase in these liver cells. And finally, let's move on to pyruvate kinase. So pyruvate kinase is responsible for catalyzing the final step of glycolysis and that means the transformation of phosphorino Pyruvate into Pyruvate and ATP.