A compound attribute that is the ratio of amount of mitochondrial peptide methionine sulfoxide reductase (human) in blood to amount of leukocyte elastase inhibitor (human) in blood. The trait is OBA_2054559 (MSRA/SERPINB1 protein level ratio in blood). Also known as: the ratio of amount of mitochondrial peptide methionine sulfoxide reductase (human) in blood to amount of leukocyte elastase inhibitor (human) in blood.