A compound attribute that is the ratio of amount of peptidyl-prolyl cis-trans isomerase FKBP4 (human) in blood to amount of RWD domain-containing protein 1 (human) in blood. The trait is FKBP4/RWDD1 protein level ratio in blood (Ontology of Biological Attributes entry OBA_2055240). Also known as: the ratio of amount of peptidyl-prolyl cis-trans isomerase FKBP4 (human) in blood to amount of RWD domain-containing protein 1 (human) in blood.