A compound attribute that is the ratio of amount of tyrosine-protein phosphatase non-receptor type 1 (human) in blood to amount of TBC1 domain family member 23 (human) in blood. The trait is Ontology of Biological Attributes id OBA_2053211 (PTPN1/TBC1D23 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 TBC1 domain family member 23 (human) in blood.