A compound attribute that is the ratio of amount of amyloid beta A4 precursor protein-binding family B member 1-interacting protein (human) in blood to amount of NAD kinase (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2054330 (APBB1IP/NADK protein level ratio in blood). Also known as: the ratio of amount of amyloid beta A4 precursor protein-binding family B member 1-interacting protein (human) in blood to amount of NAD kinase (human) in blood.