So the question might be, why isn't these steps simply the reverse of the steps we saw in Glycolysis? But these steps are exactly the reverse steps that we saw in Glycolysis. Well, as I mentioned in the previous lecture, if we simply reversed the steps that we saw in Glycolysis, in this particular case, those steps would actually be very endergonic. And so we don't want to have the input energy. And that's exactly why we change the reaction pathways for the conversion of Pyruvate into phosphorino Pyruvate. But in these steps from three to seven, all these steps basically have a free energy value that is very close to zero.