Now, when we phosphorylate the molecule that actually requires energy. And so if this reaction just took place with phosphorylation, that would mean an energy input would be required. But because we essentially couple the exothermic, the exergonic decarboxylation with the endergonic phosphorylation, this process basically the sum of those processes basically creates a favorable reaction. And so in the second step, we see that an enzyme called phosphoenol Pyruvate, carboxy kinase or Pep carboxy kinase, converts the oxalo acetate into Pep. Now, carboxy kinase once again means we're coupling the decarboxylation reaction with the phosphorylation reaction. So in this step, the highly energonic phosphorylation of this molecule is coupled with the highly exergonic decarboxylation process.