MCFD2/TXNDC5 protein level ratio in blood (OBA_2053791, an Ontology of Biological Attributes term) 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 thioredoxin domain-containing protein 5 (human) in blood. Also known as: the ratio of amount of multiple coagulation factor deficiency protein 2 (human) in blood to amount of thioredoxin domain-containing protein 5 (human) in blood.