A compound attribute that is the ratio of amount of pyridoxal phosphate homeostasis protein (human) in blood to amount of RWD domain-containing protein 1 (human) in blood. The trait is Ontology of Biological Attributes term OBA_2053516 (PLPBP/RWDD1 protein level ratio in blood). Also known as: the ratio of amount of pyridoxal phosphate homeostasis protein (human) in blood to amount of RWD domain-containing protein 1 (human) in blood.