A compound attribute that is the ratio of amount of serine protease HTRA2, mitochondrial (human) in blood to amount of protein phosphatase 1 regulatory subunit 12A (human) in blood. The trait is HTRA2/PPP1R12A protein level ratio in blood (OBA_2052966). Also known as: the ratio of amount of serine protease HTRA2, mitochondrial (human) in blood to amount of protein phosphatase 1 regulatory subunit 12A (human) in blood.