OBA_2055163 (NUCB2/RSPO3 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 R-spondin-3 (human) in blood. Also known as: the ratio of amount of nucleobindin-2 (human) in blood to amount of R-spondin-3 (human) in blood.