A compound attribute that is the ratio of amount of protein phosphatase inhibitor 2 (human) in blood to amount of serine/threonine-protein kinase 4 (human) in blood. The trait is OBA_2053504 (PPP1R2/STK4 protein level ratio in blood). Also known as: the ratio of amount of protein phosphatase inhibitor 2 (human) in blood to amount of serine/threonine-protein kinase 4 (human) in blood.