MAP4K5/TBCB protein level ratio in blood (OBA_2053890, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of mitogen-activated protein kinase kinase kinase kinase 5 (human) in blood to amount of tubulin-folding cofactor B (human) in blood. Also known as: the ratio of amount of mitogen-activated protein kinase kinase kinase kinase 5 (human) in blood to amount of tubulin-folding cofactor B (human) in blood.