And we also form the ADP. So actually this step requires energy, requires an ATP molecule. So this step is significant for two reasons. Number one is it makes the glucose more polar by adding that negative charge and this traps the glucose inside the cell. So the negatively charged phosphate group prevents the glucose from moving across the cell membrane because that membrane transport protein cannot actually attach to the glucose six phosphate because of this altered structure. Now the second reason is to begin destabilizing this molecule that increases its energy, makes it more reactive.