We have four different steps that are catalyzed by four different enzymes. And one of these steps, step number two, is catalyzed by galactose one phosphate, urinal transferase. So what this enzyme does on the normal conditions is it takes galactose one phosphate in the presence of UDP glucose. This enzyme catalyzed the transformation into UDP galactose. So this becomes UDP galactose, and the UDP glucose becomes glucose one phosphate. And then the glucose one phosphate can basically go on to form glucose six phosphate, which can be fed, incorporated into the glycolytic pathway, and the UDP galactose can be transformed into the UDP glucose.