A compound attribute that is the ratio of amount of arylsulfatase A (human) in blood to amount of sialomucin core protein 24 (human) in blood. The trait is ARSA/CD164 protein level ratio in blood (Ontology of Biological Attributes entry OBA_2054090). Also known as: the ratio of amount of arylsulfatase A (human) in blood to amount of sialomucin core protein 24 (human) in blood.