ESAM/TGFB1 protein level ratio in blood (Ontology of Biological Attributes id OBA_2054762) can be described as follows. A compound attribute that is the ratio of amount of endothelial cell-selective adhesion molecule (human) in blood to amount of transforming growth factor beta-1 (human) in blood. Also known as: the ratio of amount of endothelial cell-selective adhesion molecule (human) in blood to amount of transforming growth factor beta-1 (human) in blood.