A compound attribute that is the ratio of amount of peptidyl-prolyl cis-trans isomerase FKBP4 (human) in blood to amount of kynurenine--oxoglutarate transaminase 1 (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2055239 (FKBP4/KYAT1 protein level ratio in blood). Also known as: the ratio of amount of peptidyl-prolyl cis-trans isomerase FKBP4 (human) in blood to amount of kynurenine--oxoglutarate transaminase 1 (human) in blood.