The orthophosphate actually acts as a nuclear file that cleaves this alpha one four glycocitic bond to basically form these two product molecules. We have a glucose one phosphate and we have the glycogen that now contains one less glucose because we removed this terminal glucose molecule here. Now we have this glycogen that contains N minus one number of glucose molecules. Now, inside the cells of our body, this reaction is a product favorite reaction and that's because of two important reasons. Number one is this reaction is energetically favorable. Why?