ADGRG2/SDC1 protein level ratio in blood (OBA_2053752, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of adhesion G-protein coupled receptor G2 (human) in blood to amount of syndecan-1 (human) in blood. Also known as: the ratio of amount of adhesion G-protein coupled receptor G2 (human) in blood to amount of syndecan-1 (human) in blood.