A compound attribute that is the ratio of amount of proepiregulin (human) in blood to amount of megakaryocyte and platelet inhibitory receptor G6b (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2054748 (EREG/MPIG6B protein level ratio in blood). Also known as: the ratio of amount of proepiregulin (human) in blood to amount of megakaryocyte and platelet inhibitory receptor G6b (human) in blood.