A compound attribute that is the ratio of amount of FAS-associated death domain protein (human) in blood to amount of pyridoxal phosphate homeostasis protein (human) in blood. The trait is FADD/PLPBP protein level ratio in blood (OBA_2055345, an Ontology of Biological Attributes id). Also known as: the ratio of amount of FAS-associated death domain protein (human) in blood to amount of pyridoxal phosphate homeostasis protein (human) in blood.