A compound attribute that is the ratio of amount of mitotic spindle assembly checkpoint protein MAD1 (human) in blood to amount of poly [ADP-ribose] polymerase 1 (human) in blood. The trait is OBA_2053884 (MAD1L1/PARP1 protein level ratio in blood). Also known as: the ratio of amount of mitotic spindle assembly checkpoint protein MAD1 (human) in blood to amount of poly [ADP-ribose] polymerase 1 (human) in blood.