A compound attribute that is the ratio of amount of basement membrane-specific heparan sulfate proteoglycan core protein (human) in blood to amount of prostaglandin-H2 D-isomerase (human) in blood. The trait is Ontology of Biological Attributes term OBA_2052962 (HSPG2/PTGDS protein level ratio in blood). Also known as: the ratio of amount of basement membrane-specific heparan sulfate proteoglycan core protein (human) in blood to amount of prostaglandin-H2 D-isomerase (human) in blood.