A compound attribute that is the ratio of amount of tyrosine-protein phosphatase non-receptor type 1 (human) in blood to amount of secretory carrier-associated membrane protein 3 (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2053210 (PTPN1/SCAMP3 protein level ratio in blood). Also known as: the ratio of amount of tyrosine-protein phosphatase non-receptor type 1 (human) in blood to amount of secretory carrier-associated membrane protein 3 (human) in blood.