A compound attribute that is the ratio of amount of adenosylhomocysteinase (human) in blood to amount of fatty acid-binding protein 5 (human) in blood. The trait is Ontology of Biological Attributes id OBA_2053648 (AHCY/FABP5 protein level ratio in blood). Also known as: the ratio of amount of adenosylhomocysteinase (human) in blood to amount of fatty acid-binding protein 5 (human) in blood.