A compound attribute that is the ratio of amount of forkhead box protein O1 (human) in blood to amount of serine/threonine-protein kinase STK11 (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2054178 (FOXO1/STK11 protein level ratio in blood). Also known as: the ratio of amount of forkhead box protein O1 (human) in blood to amount of serine/threonine-protein kinase STK11 (human) in blood.