A compound attribute that is the ratio of amount of cyclin-dependent kinase 4 inhibitor D (human) in blood to amount of hippocalcin-like protein 1 (human) in blood. The trait is Ontology of Biological Attributes term OBA_2055458 (CDKN2D/HPCAL1 protein level ratio in blood). Also known as: the ratio of amount of cyclin-dependent kinase 4 inhibitor D (human) in blood to amount of hippocalcin-like protein 1 (human) in blood.