CDKN1A/PLA2G4A protein level ratio in blood (Ontology of Biological Attributes term OBA_2055446) can be described as follows. A compound attribute that is the ratio of amount of cyclin-dependent kinase inhibitor 1 (human) in blood to amount of cytosolic phospholipase A2 (human) in blood. Also known as: the ratio of amount of cyclin-dependent kinase inhibitor 1 (human) in blood to amount of cytosolic phospholipase A2 (human) in blood.