A compound attribute that is the ratio of level of neutrophil defensin 1 (human) in blood to amount of prostaglandin-H2 D-isomerase (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2054085 (DEFA1/PTGDS protein level ratio in blood). Also known as: the ratio of level of neutrophil defensin 1 (human) in blood to amount of prostaglandin-H2 D-isomerase (human) in blood.