Ontology of Biological Attributes entry OBA_2053632 (DLL1/NOTCH1 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of delta-like protein 1 (human) in blood to amount of neurogenic locus notch homolog protein 1 (human) in blood. Also known as: the ratio of amount of delta-like protein 1 (human) in blood to amount of neurogenic locus notch homolog protein 1 (human) in blood.