A compound attribute that is the ratio of amount of proto-oncogene tyrosine-protein kinase Src (human) in blood to amount of sulfotransferase 1A1 (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2055710 (SRC/SULT1A1 protein level ratio in blood). Also known as: the ratio of amount of proto-oncogene tyrosine-protein kinase Src (human) in blood to amount of sulfotransferase 1A1 (human) in blood.