TYR and disorder of methionine catabolism: A number of disorders were identified, including TYR (Tyrosinemia), MET (Hypermethioninemia), PKU (Phenylketonuria), MSUD (Maple syrup urine disease), NKH (Nonketotic hyperglycinemia), CPT1A (Carnitine palmitoyltransferase 1 deficiency), PA (Propionic acidemia), and MCAD (Medium-chain acyl-CoA dehydrogenase deficiency), and MMA (Methylmalonic acidemia).