A compound attribute that is the ratio of amount of Crk-like protein (human) in blood to amount of mitochondrial fission 1 protein (human) in blood. The trait is CRKL/FIS1 protein level ratio in blood (OBA_2054498, an Ontology of Biological Attributes entry). Also known as: the ratio of amount of Crk-like protein (human) in blood to amount of mitochondrial fission 1 protein (human) in blood.