METAP2/PLPBP protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054441) can be described as follows. A compound attribute that is the ratio of amount of methionine aminopeptidase 2 (human) in blood to amount of pyridoxal phosphate homeostasis protein (human) in blood. Also known as: the ratio of amount of methionine aminopeptidase 2 (human) in blood to amount of pyridoxal phosphate homeostasis protein (human) in blood.