A compound attribute that is the ratio of amount of interleukin-6 receptor subunit beta (human) in blood to amount of macrophage receptor MARCO (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2054362 (IL6ST/MARCO protein level ratio in blood). Also known as: the ratio of amount of interleukin-6 receptor subunit beta (human) in blood to amount of macrophage receptor MARCO (human) in blood.