A compound attribute that is the ratio of amount of dihydropteridine reductase (human) in blood to amount of thimet oligopeptidase (human) in blood. The trait is QDPR/THOP1 protein level ratio in blood (OBA_2053224). Also known as: the ratio of amount of dihydropteridine reductase (human) in blood to amount of thimet oligopeptidase (human) in blood.