A compound attribute that is the ratio of amount of Delta(14)-sterol reductase LBR (human) in blood to amount of mitotic spindle assembly checkpoint protein MAD1 (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2054950 (LBR/MAD1L1 protein level ratio in blood). Also known as: the ratio of amount of Delta(14)-sterol reductase LBR (human) in blood to amount of mitotic spindle assembly checkpoint protein MAD1 (human) in blood.