PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2311261-3 1990 We developed an assay for human liver NNMT based on the extraction of the positively charged reaction product into 60% isoamyl alcohol in toluene in the presence of the ion-pairing reagent 1-heptanesulfonic acid. Toluene 138-145 nicotinamide N-methyltransferase Homo sapiens 38-42