A compound attribute that is the ratio of amount of Axin-1 (human) in blood to amount of plexin-A4 (human) in blood. The trait is AXIN1/PLXNA4 protein level ratio in blood (OBA_2053484). Also known as: the ratio of amount of Axin-1 (human) in blood to amount of plexin-A4 (human) in blood.