Ontology of Biological Attributes entry OBA_2054579 (MMP9/PGLYRP1 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of matrix metalloproteinase-9 (human) in blood to amount of peptidoglycan recognition protein 1 (human) in blood. Also known as: the ratio of amount of matrix metalloproteinase-9 (human) in blood to amount of peptidoglycan recognition protein 1 (human) in blood.