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. And unlike an oxygenase, where one of the oxygen atoms was used to form water, and the other oxygen atom went onto the phenolalanine to form the tyrosine, an enzyme that we call dioxygenase uses a diatomic water, a diatomic oxygen, and it uses both atoms of that diatomic oxygen to attach it onto that substrate molecule. So in this step, we basically want to remove this carbon dioxide, and we want to use both of the oxygen atoms and attach them onto this substrate to basically form an intermediate we call homogenesate. So the enzyme that catalyze this step is p hydroxy phenyl, Pyruvate dioxygenase.