A compound attribute that is the ratio of amount of caspase-3 (human) in blood to amount of leukocyte elastase inhibitor (human) in blood. The trait is CASP3/SERPINB1 protein level ratio in blood (Ontology of Biological Attributes id OBA_2054776). Also known as: the ratio of amount of caspase-3 (human) in blood to amount of leukocyte elastase inhibitor (human) in blood.