A compound attribute that is the ratio of amount of glutathione S-transferase A1 (human) in blood to amount of sulfotransferase 2A1 (human) in blood. The trait is GSTA1/SULT2A1 protein level ratio in blood (OBA_2053454, an Ontology of Biological Attributes id). Also known as: the ratio of amount of glutathione S-transferase A1 (human) in blood to amount of sulfotransferase 2A1 (human) in blood.