The amount of a peptidyl-prolyl cis-trans isomerase FKBP1B when measured in blood. The trait is Ontology of Biological Attributes entry OBA_2050636 (level of peptidyl-prolyl cis-trans isomerase FKBP1B in blood). Also known as: blood peptidyl-prolyl cis-trans isomerase FKBP1B amount.