Ontology of Biological Attributes id OBA_2054550 (MPI/SIRT2 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of mannose-6-phosphate isomerase (human) in blood to amount of NAD-dependent protein deacetylase sirtuin-2 (human) in blood. Also known as: the ratio of amount of mannose-6-phosphate isomerase (human) in blood to amount of NAD-dependent protein deacetylase sirtuin-2 (human) in blood.