A compound attribute that is the ratio of amount of forkhead box protein O1 (human) in blood to amount of NEDD8 ultimate buster 1 (human) in blood. The trait is Ontology of Biological Attributes term OBA_2054147 (FOXO1/NUB1 protein level ratio in blood). Also known as: the ratio of amount of forkhead box protein O1 (human) in blood to amount of NEDD8 ultimate buster 1 (human) in blood.