Ontology of Biological Attributes id OBA_2054100 (ART3/GPC1 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of ecto-ADP-ribosyltransferase 3 (human) in blood to amount of glypican-1 (human) in blood. Also known as: the ratio of amount of ecto-ADP-ribosyltransferase 3 (human) in blood to amount of glypican-1 (human) in blood.