midbrain ribonucleic acid level central gray substance of midbrain ribonucleic acid level 2025-01-30T17:33:28Z CMO:0004044 PAG RNA level This is any measurement of the absolute or relative amount(s) of one or more of the ribonucleic acids (RNAs) of which the tissue of the central gray substance of the midbrain is formed or composed. VT:0010791 central gray RNA level central gray ribonucleic acid level central gray substance of midbrain RNA level clinical_measurement_ontology periaqueductal gray RNA level slaulederkind