Ontology of Biological Attributes term OBA_2055373 (CD22/SEMA7A protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of B-cell receptor CD22 (human) in blood to amount of semaphorin-7A (human) in blood. Also known as: the ratio of amount of B-cell receptor CD22 (human) in blood to amount of semaphorin-7A (human) in blood.