So one of the oxygen atoms goes on to this ring of the phenomealine, and the other one is used to form a water molecule. Now, once we form tyrosine, what happens next? Well, next we basically have to use an amino transferase to transfer the alpha amino group from tyrosine onto an alpha keto acid. And so we have the enzyme tyrosine amino transferase. And just like any immunransferase, this one has to use PLP. So, periodoxylphostate, we transfer this alpha aminogroup from the tyrosine onto an alpha ketoglutrate.