A compound attribute that is the ratio of amount of early activation antigen CD69 (human) in blood to amount of tyrosine-protein phosphatase non-receptor type 6 (human) in blood. The trait is CD69/PTPN6 protein level ratio in blood (OBA_2053354, an Ontology of Biological Attributes term). Also known as: the ratio of amount of early activation antigen CD69 (human) in blood to amount of tyrosine-protein phosphatase non-receptor type 6 (human) in blood.