Ontology of Biological Attributes id OBA_2054896 (CLSTN2/THBS2 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of calsyntenin-2 (human) in blood to amount of thrombospondin-2 (human) in blood. Also known as: the ratio of amount of calsyntenin-2 (human) in blood to amount of thrombospondin-2 (human) in blood.