A compound attribute that is the ratio of amount of peptidyl-prolyl cis-trans isomerase FKBP5 (human) in blood to amount of zinc finger and BTB domain-containing protein 16 (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2055250 (FKBP5/ZBTB16 protein level ratio in blood). Also known as: the ratio of amount of peptidyl-prolyl cis-trans isomerase FKBP5 (human) in blood to amount of zinc finger and BTB domain-containing protein 16 (human) in blood.