PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 1681808-9 1991 Phenobarbital, methylcholanthrene and dexamethasone were found to increase significantly gamma-glutamyltransferase while tyrosine aminotransferase activity was enhanced by dexamethasone. Phenobarbital 0-13 gamma-glutamyltransferase 1 Rattus norvegicus 89-114