MCFD2/VSIR protein level ratio in blood (OBA_2053792, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of multiple coagulation factor deficiency protein 2 (human) in blood to amount of V-type immunoglobulin domain-containing suppressor of T-cell activation (human) in blood. Also known as: the ratio of amount of multiple coagulation factor deficiency protein 2 (human) in blood to amount of V-type immunoglobulin domain-containing suppressor of T-cell activation (human) in blood.