PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 9565293-3 1998 NAT2 activity was calculated from HPLC analysis of the ratio of the caffeine metabolites 5-acetylamino-6-formylamino-3-methyluracil (AFMU) and 1-methylxanthine (1MX) in the urine. 1-methylxanthine 143-159 N-acetyltransferase 2 Homo sapiens 0-4