A compound attribute that is the ratio of amount of plexin-A4 (human) in blood to amount of tubulinyl-Tyr carboxypeptidase 1 (human) in blood. The trait is OBA_2053527 (PLXNA4/VASH1 protein level ratio in blood). Also known as: the ratio of amount of plexin-A4 (human) in blood to amount of tubulinyl-Tyr carboxypeptidase 1 (human) in blood.