PCDH17/SEMA7A protein level ratio in blood (OBA_2054036) can be described as follows. A compound attribute that is the ratio of amount of protocadherin-17 (human) in blood to amount of semaphorin-7A (human) in blood. Also known as: the ratio of amount of protocadherin-17 (human) in blood to amount of semaphorin-7A (human) in blood.