A compound attribute that is the ratio of amount of ephrin type-A receptor 1 (human) in blood to amount of inhibin beta C chain (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2054719 (EPHA1/INHBC protein level ratio in blood). Also known as: the ratio of amount of ephrin type-A receptor 1 (human) in blood to amount of inhibin beta C chain (human) in blood.