PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 27411382-4 2016 NE is synthesized from tyrosine by the rate-limiting enzyme, tyrosine hydroxylase (TH), and tyrosine is catabolized by tyrosine aminotransferase (TAT). Tyrosine 23-31 tyrosine hydroxylase Rattus norvegicus 61-81