A compound attribute that is the ratio of amount of pre-pro-epidermal growth factor (human) in blood to amount of megakaryocyte and platelet inhibitory receptor G6b (human) in blood. The trait is Ontology of Biological Attributes term OBA_2055605 (EGF/MPIG6B protein level ratio in blood). Also known as: the ratio of amount of pre-pro-epidermal growth factor (human) in blood to amount of megakaryocyte and platelet inhibitory receptor G6b (human) in blood.