METAP2/PDCD5 protein level ratio in blood (OBA_2054439, an Ontology of Biological Attributes term) can be described as follows. A compound attribute that is the ratio of amount of methionine aminopeptidase 2 (human) in blood to amount of programmed cell death protein 5 (human) in blood. Also known as: the ratio of amount of methionine aminopeptidase 2 (human) in blood to amount of programmed cell death protein 5 (human) in blood.