A compound attribute that is the ratio of amount of frataxin, mitochondrial (human) in blood to amount of thiosulfate sulfurtransferase (human) in blood. The trait is FXN/TST protein level ratio in blood (OBA_2053776). Also known as: the ratio of amount of frataxin, mitochondrial (human) in blood to amount of thiosulfate sulfurtransferase (human) in blood.