So in this final step, an ATP is used to phosphorylate a UDP and that regenerates that UTP. So once again, let's very briefly overview this entire process. So we ingest a meal that is rich in sugar molecules. The blood level of glucose basically increases. Our liver wants to maintain that and decrease it back to normal. So the liver cells uptake the glucose molecules to trap the glucose within the cell and to prevent it from leaving the cell, they use hexacionase and an ATP to form glucose six phosphate.