A compound attribute that is the ratio of amount of mitochondrial peptide methionine sulfoxide reductase (human) in blood to amount of peroxiredoxin-5, mitochondrial (human) in blood. The trait is MSRA/PRDX5 protein level ratio in blood (OBA_2054557, an Ontology of Biological Attributes entry). Also known as: the ratio of amount of mitochondrial peptide methionine sulfoxide reductase (human) in blood to amount of peroxiredoxin-5, mitochondrial (human) in blood.