A compound attribute that is the ratio of amount of activin receptor type-1-like (human) in blood to amount of lysosome membrane protein 2 (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2055777 (ACVRL1/SCARB2 protein level ratio in blood). Also known as: the ratio of amount of activin receptor type-1-like (human) in blood to amount of lysosome membrane protein 2 (human) in blood.