ALCAM/CDH5 protein level ratio in blood (OBA_2054291, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of CD166 antigen (human) in blood to amount of cadherin-5 (human) in blood. Also known as: the ratio of amount of CD166 antigen (human) in blood to amount of cadherin-5 (human) in blood.