A compound attribute that is the ratio of amount of CD166 antigen (human) in blood to amount of macrophage scavenger receptor types I and II (human) in blood. The trait is OBA_2054297 (ALCAM/MSR1 protein level ratio in blood). Also known as: the ratio of amount of CD166 antigen (human) in blood to amount of macrophage scavenger receptor types I and II (human) in blood.