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. Now, the alpha ketoglutrate, upon receiving that amino group, we form glutamate. Upon removing the alpha amino group from tyrosine, we form this alpha keto acid, the p hydroxy phenyl pyruvate. Now, once we form this molecule, the next step is to use a dioxygenase.