And it has many, many other roles. For instance, it uses the glycolysis process to basically synthesize building blocks like fatty acids as well as amino acids and so forth. So liver cells have many different types of functions. And as a result, it's no surprise that the way that our liver cells regulate the process of glycolysis is more complex than the way that our skeleton muscle cells regulate the process of glycolysis. So in our discussion, we're going to focus on liver cells and how liver cells regulate the process of glycolysis. And although we'll see many similarities between skeletal muscle cells and liver cells, we'll see that liver cells use a slightly more complex regulatory pathway.