And what that does is it traps that glucose in a cell and begins to destabilize that glucose. It makes it more reactive. Now, the second step in stage one, one is to basically transform the glucose isomer into the fructose isomer and we form fructose six phosphate. Now, the reason we have to form the fructose we'll talk about in just a moment. But the final step in stage one is to take that fructose, fructose six phosphate and transform it into fructose one six bisphosphate. And once we form the fructose one six bisphosphate, that molecule is reactive enough to go on to stage two.