NOTCH3/PTPRS protein level ratio in blood (OBA_2055135, an Ontology of Biological Attributes entry) can be described as follows. A compound attribute that is the ratio of amount of neurogenic locus notch homolog protein 3 (human) in blood to amount of receptor-type tyrosine-protein phosphatase S (human) in blood. Also known as: the ratio of amount of neurogenic locus notch homolog protein 3 (human) in blood to amount of receptor-type tyrosine-protein phosphatase S (human) in blood.