And it's trapped because this oxygen doesn't have an age, it has this phosphoryl group. And so what must happen in the final stage is this phosphoryl group must be donated to an ADP molecule and replaced with an H. And once it is replaced with an H, it can transform into the more stable ketone state, the Pyruvate molecule. And that's exactly what happens in a final stage. We take this molecule that is high in energy, so it contains very active bonds and that makes it a very good molecule that actually transfers that phosphoral group onto ADP. And so in the presence of ADP and H plus, we take this molecule and by the action of Pyruvate kinase so again, we form Pyruvate in the last step and this reaction is a phosphorylation reaction. So we're using a kinase and we form the Pyruvate in the ketone state and that ATP molecule.