A compound attribute that is the ratio of amount of KIF-binding protein (human) in blood to amount of TBC1 domain family member 23 (human) in blood. The trait is KIFBP/TBC1D23 protein level ratio in blood (Ontology of Biological Attributes entry OBA_2055504). Also known as: the ratio of amount of KIF-binding protein (human) in blood to amount of TBC1 domain family member 23 (human) in blood.