MCAM/NCAM1 protein level ratio in blood (OBA_2053789) can be described as follows. A compound attribute that is the ratio of amount of cell surface glycoprotein MUC18 (human) in blood to amount of neural cell adhesion molecule 1 (human) in blood. Also known as: the ratio of amount of cell surface glycoprotein MUC18 (human) in blood to amount of neural cell adhesion molecule 1 (human) in blood.