A compound attribute that is the ratio of amount of interleukin-1 receptor-associated kinase 4 (human) in blood to amount of tubulin-folding cofactor B (human) in blood. The trait is Ontology of Biological Attributes term OBA_2055529 (IRAK4/TBCB protein level ratio in blood). Also known as: the ratio of amount of interleukin-1 receptor-associated kinase 4 (human) in blood to amount of tubulin-folding cofactor B (human) in blood.