A compound attribute that is the ratio of amount of endoplasmic reticulum resident protein 44 (human) in blood to amount of inactive C-alpha-formylglycine-generating enzyme 2 (human) in blood. The trait is ERP44/SUMF2 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054754). Also known as: the ratio of amount of endoplasmic reticulum resident protein 44 (human) in blood to amount of inactive C-alpha-formylglycine-generating enzyme 2 (human) in blood.