CDKN1A/FXN protein level ratio in blood (OBA_2055443) can be described as follows. A compound attribute that is the ratio of amount of cyclin-dependent kinase inhibitor 1 (human) in blood to amount of frataxin, mitochondrial (human) in blood. Also known as: the ratio of amount of cyclin-dependent kinase inhibitor 1 (human) in blood to amount of frataxin, mitochondrial (human) in blood.