A compound attribute that is the ratio of amount of glutathione-specific gamma-glutamylcyclotransferase 2 (human) in blood to amount of TBC1 domain family member 17 (human) in blood. The trait is CHAC2/TBC1D17 protein level ratio in blood (OBA_2055560, an Ontology of Biological Attributes entry). Also known as: the ratio of amount of glutathione-specific gamma-glutamylcyclotransferase 2 (human) in blood to amount of TBC1 domain family member 17 (human) in blood.