A compound attribute that is the ratio of amount of mitochondrial peptide methionine sulfoxide reductase (human) in blood to amount of protein S100-A4 (human) in blood. The trait is Ontology of Biological Attributes term OBA_2054558 (MSRA/S100A4 protein level ratio in blood). Also known as: the ratio of amount of mitochondrial peptide methionine sulfoxide reductase (human) in blood to amount of protein S100-A4 (human) in blood.