Ontology of Biological Attributes identifier OBA_2055591 (EFEMP1/TGFBR3 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of EGF-containing fibulin-like extracellular matrix protein 1 (human) in blood to amount of transforming growth factor beta receptor type 3 (human) in blood. Also known as: the ratio of amount of EGF-containing fibulin-like extracellular matrix protein 1 (human) in blood to amount of transforming growth factor beta receptor type 3 (human) in blood.