A compound attribute that is the ratio of amount of integrin beta-1-binding protein 2 (human) in blood to amount of plexin-A4 (human) in blood. The trait is ITGB1BP2/PLXNA4 protein level ratio in blood (OBA_2055470). Also known as: the ratio of amount of integrin beta-1-binding protein 2 (human) in blood to amount of plexin-A4 (human) in blood.