DLL1/NECTIN4 protein level ratio in blood (OBA_2053631) can be described as follows. A compound attribute that is the ratio of amount of delta-like protein 1 (human) in blood to amount of nectin-4 (human) in blood. Also known as: the ratio of amount of delta-like protein 1 (human) in blood to amount of nectin-4 (human) in blood.