A compound attribute that is the ratio of amount of integrin alpha-5 (human) in blood to amount of leukocyte immunoglobulin-like receptor subfamily A member 2 (human) in blood. The trait is ITGA5/LILRA2 protein level ratio in blood (OBA_2055533). Also known as: the ratio of amount of integrin alpha-5 (human) in blood to amount of leukocyte immunoglobulin-like receptor subfamily A member 2 (human) in blood.