A compound attribute that is the ratio of amount of DnaJ homolog subfamily A member 2 (human) in blood to amount of plexin-A4 (human) in blood. The trait is DNAJA2/PLXNA4 protein level ratio in blood (OBA_2053588). Also known as: the ratio of amount of DnaJ homolog subfamily A member 2 (human) in blood to amount of plexin-A4 (human) in blood.