Well, the major difference is the presence of this modified group. And this group contains a net negative charge, specifically a charge of negative two. So compared to this glucose molecule, which has a net charge of zero, this molecule has a net negative charge. And whenever a system in nature contains charge, what that means is its energy is higher, it's less stable and it's more reactive. So essentially bifus formulating a glucose molecule and transforming it into glucose expositate, our cells increase the reactivity of the glucose molecule and that allows it to basically undergo further processes and ultimately break down and form the ATP energy molecules that our cells use as the major energy source. Now, the second reason why we phosphorylate glucose molecules is to increase the polarity of the glucose molecule.