monoiodotyrosine
noun
                                                                                                                            
                                                            mono·iodo·ty·ro·sine
                    
                                                                                                              
                                                                                                                                  -ī-ˌōd-ə-ˈtī-rə-ˌsēn, -ī-ˌäd-ə-  
                                                      
                                                          
            
                                
              
          
                                                      : an iodinated tyrosine C9H10INO3 that is produced in the thyroid gland by the substitution of one iodine atom in the amino acid for an atom of hydrogen, that undergoes further iodination to produce diiodotyrosine, and that combines with diiodotyrosine to form triiodothyronine                                      
                
                    
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  Merriam-Webster unabridged




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