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 DNA-directed RNA polymerases I, II, and III subunit RPABC2 (human) in blood. The trait is APBB1IP/POLR2F protein level ratio in blood (Ontology of Biological Attributes entry OBA_2054332). 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 DNA-directed RNA polymerases I, II, and III subunit RPABC2 (human) in blood.