Ontology of Biological Attributes term OBA_2055706 (SPINT2/TNFSF13 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of Kunitz-type protease inhibitor 2 (human) in blood to amount of tumor necrosis factor ligand superfamily member 13 isoforms alpha/beta/gamma/4/5 (human) in blood. Also known as: the ratio of amount of Kunitz-type protease inhibitor 2 (human) in blood to amount of tumor necrosis factor ligand superfamily member 13 isoforms alpha/beta/gamma/4/5 (human) in blood.