A compound attribute that is the ratio of amount of dickkopf-related protein 4 (human) in blood to amount of lithostathine-1-beta (human) in blood. The trait is Ontology of Biological Attributes id OBA_2053624 (DKK4/REG1B protein level ratio in blood). Also known as: the ratio of amount of dickkopf-related protein 4 (human) in blood to amount of lithostathine-1-beta (human) in blood.