liver ribonucleic acid level liver O-6-methylguanine-DNA methyltransferase mRNA level 2013-11-22T16:12:06Z CMO:0001922 JSmith Measurement of the amount of messenger ribonucleic acids (mRNA) which specifically codes for the amino acid sequence of the enzyme O-6-methylguanine-DNA methyltransferase (MGMT) in a specified sample of liver. MGMT is an enzyme that repairs the naturally occurring mutagenic DNA lesion O6-methylguanine back to guanine to prevent mismatch and error during DNA replication and transcription. clinical_measurement_ontology liver MGMT mRNA level