A compound attribute that is the ratio of amount of breakpoint cluster region protein (human) in blood to amount of nuclear factor of activated T-cells, cytoplasmic 1 (human) in blood. The trait is BCR/NFATC1 protein level ratio in blood (OBA_2053245). Also known as: the ratio of amount of breakpoint cluster region protein (human) in blood to amount of nuclear factor of activated T-cells, cytoplasmic 1 (human) in blood.