A compound attribute that is the ratio of amount of protein phosphatase methylesterase 1 (human) in blood to amount of TBC1 domain family member 23 (human) in blood. The trait is PPME1/TBC1D23 protein level ratio in blood (Ontology of Biological Attributes entry OBA_2053493). Also known as: the ratio of amount of protein phosphatase methylesterase 1 (human) in blood to amount of TBC1 domain family member 23 (human) in blood.