Ontology of Biological Attributes id OBA_2053232 (REG1B/REG3A protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of lithostathine-1-beta (human) in blood to amount of regenerating islet-derived protein 3-alpha (human) in blood. Also known as: the ratio of amount of lithostathine-1-beta (human) in blood to amount of regenerating islet-derived protein 3-alpha (human) in blood.