A compound attribute that is the ratio of amount of mediator of RNA polymerase II transcription subunit 18 (human) in blood to amount of zinc finger and BTB domain-containing protein 16 (human) in blood. The trait is OBA_2053797 (MED18/ZBTB16 protein level ratio in blood). Also known as: the ratio of amount of mediator of RNA polymerase II transcription subunit 18 (human) in blood to amount of zinc finger and BTB domain-containing protein 16 (human) in blood.