PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 2070498-4 1991 The MGMT activity was assayed by measuring the 3H radioactivity transferred from the substrate DNA containing [methyl-3H]-labeled O6-methylguanine to an acid-insoluble protein fraction. methyl-3h 111-120 O-6-methylguanine-DNA methyltransferase Homo sapiens 4-8