So remember, whenever we have charge that destabilize the structure and in this particular case we have no charge, in this case we have a charge of negative two. So that means this molecule is higher in energy, less stable and more reactive than this glucose. And that's important in basically destabilizing that structure so that in step two it is able to actually react and break down into smaller components. Remember, the entire point of stage one is to trap the molecule and make it less stable. So once again, glucose moves into the cell with the help of a membrane transporter. Once inside the cytoplasm, it undergoes a phosphorylation process in which hexokinase adds a phosphate group, phosphoryl group onto the 6th carbon by taking it away from ATP.