A compound attribute that is the ratio of amount of protein CREG1 (human) in blood to amount of cathepsin Z (human) in blood. The trait is Ontology of Biological Attributes term OBA_2054526 (CREG1/CTSZ protein level ratio in blood). Also known as: the ratio of amount of protein CREG1 (human) in blood to amount of cathepsin Z (human) in blood.