A compound attribute that is the ratio of amount of cysteine protease ATG4A (human) in blood to amount of protein phosphatase methylesterase 1 (human) in blood. The trait is OBA_2054108 (ATG4A/PPME1 protein level ratio in blood). Also known as: the ratio of amount of cysteine protease ATG4A (human) in blood to amount of protein phosphatase methylesterase 1 (human) in blood.