has role has role is tautomer of iodophenol iodothyronine thyroxine zwitterion thyroxine An iodothyronine compound having iodo substituents at the 3-, 3'-, 5- and 5'-positions. 2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoic acid O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-DL-tyrosine DL-Thyroxine CHEBI:30660 chebi_ontology Thx mitogen 2-halophenol tyrosine derivative non-proteinogenic alpha-amino acid