PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 34304009-2 2021 NNMT is an enzyme that catalyzes the N-methylation of the endogenous substrate nicotinamide, as well as exogenous xenobiotics. Niacinamide 79-91 nicotinamide N-methyltransferase Rattus norvegicus 0-4