PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 22471835-3 2012 Tyrosine hydroxylase (TH) is the rate-limiting enzyme in the biosynthesis of catecholamines. Catecholamines 77-91 tyrosine hydroxylase Rattus norvegicus 0-20 22471835-3 2012 Tyrosine hydroxylase (TH) is the rate-limiting enzyme in the biosynthesis of catecholamines. Catecholamines 77-91 tyrosine hydroxylase Rattus norvegicus 22-24