A compound attribute that is the ratio of amount of early activation antigen CD69 (human) in blood to amount of cyclin-dependent kinase 4 inhibitor D (human) in blood. The trait is CD69/CDKN2D protein level ratio in blood (Ontology of Biological Attributes id OBA_2053337). Also known as: the ratio of amount of early activation antigen CD69 (human) in blood to amount of cyclin-dependent kinase 4 inhibitor D (human) in blood.