A compound attribute that is the ratio of amount of RWD domain-containing protein 1 (human) in blood to amount of sulfotransferase 1A1 (human) in blood. The trait is RWDD1/SULT1A1 protein level ratio in blood (OBA_2053311, an Ontology of Biological Attributes term). Also known as: the ratio of amount of RWD domain-containing protein 1 (human) in blood to amount of sulfotransferase 1A1 (human) in blood.