A compound attribute that is the ratio of amount of cysteine protease ATG4A (human) in blood to amount of glutathione-specific gamma-glutamylcyclotransferase 2 (human) in blood. The trait is OBA_2054106 (ATG4A/CHAC2 protein level ratio in blood). Also known as: the ratio of amount of cysteine protease ATG4A (human) in blood to amount of glutathione-specific gamma-glutamylcyclotransferase 2 (human) in blood.