And so we basically activate the sugar by adding that nucleotide component. And now we have an activated glucose nucleotide. And now we can use the glycosal transferase to basically catalyze the formation of the glycocitic bond between this carbon of the incoming glucose and a carbon on that sugar molecule. Now, in this particular case, because this is glucose, this molecule is known as urine and diphosphate glucose. Now, once we form that bond, this is the bond that is formed, showed in green, that's the glycocitic bond. And of course, instead of having the sugar here, we can also have a protein or we can have a lipid.