Ontology of Biological Attributes id OBA_2055134 (NOTCH1/TIE1 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of neurogenic locus notch homolog protein 1 (human) in blood to amount of tyrosine-protein kinase receptor Tie-1 (human) in blood. Also known as: the ratio of amount of neurogenic locus notch homolog protein 1 (human) in blood to amount of tyrosine-protein kinase receptor Tie-1 (human) in blood.