A compound attribute that is the ratio of amount of protein disulfide isomerase CRELD2 (human) in blood to amount of inactive C-alpha-formylglycine-generating enzyme 2 (human) in blood. The trait is CRELD2/SUMF2 protein level ratio in blood (Ontology of Biological Attributes term OBA_2054489). Also known as: the ratio of amount of protein disulfide isomerase CRELD2 (human) in blood to amount of inactive C-alpha-formylglycine-generating enzyme 2 (human) in blood.