Ontology of Biological Attributes identifier OBA_2055212 (NUCB2/P4HB protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of nucleobindin-2 (human) in blood to amount of protein disulfide-isomerase (human) in blood. Also known as: the ratio of amount of nucleobindin-2 (human) in blood to amount of protein disulfide-isomerase (human) in blood.