A compound attribute that is the ratio of amount of interactor protein for cytohesin exchange factors 1 (human) in blood to amount of tubulin-folding cofactor B (human) in blood. The trait is OBA_2054382 (IPCEF1/TBCB protein level ratio in blood). Also known as: the ratio of amount of interactor protein for cytohesin exchange factors 1 (human) in blood to amount of tubulin-folding cofactor B (human) in blood.