And what that means is these individuals cannot actually form a functional enzyme. And what that means is if this enzyme isn't actually formed or is dysfunctional, what that means is it can carry out a specific type of function. Now this enzyme is actually an important enzyme that is involved in the galactose glucose interconversion pathway that we focused on in detail in the previous lecture. So recall from the previous lecture that when galactose is uptaken by the cells, the galactose must be transformed into glucose six phosphate before it can actually begin to break down into ATP molecules. And the conversion of galactose into glucose phosphate is known as Galactose glucose interconversion pathway. And within this pathway.