So to basically bypass that highly endergonic process, we create a different process, a different reaction pathway that bypasses it, and this is a much more favorable reaction. So in a two step process, we're able to actually transform the Pyruvate molecule into a phosphate ENL Pyruvate by using a favorable reaction pathway. So let's begin by focusing on step number one. And in step number one, we basically want to carboxylate a Pyruvate molecule to form an oxalo acetate. Now, if we simply try to add a carbon dioxide onto the Pyruvate to form the oxyloacetate, that reaction in itself actually requires energy. It would be an endorganic process under cellular conditions.