BST2/MME protein level ratio in blood (OBA_2053163) can be described as follows. A compound attribute that is the ratio of amount of bone marrow stromal antigen 2 (human) in blood to amount of neprilysin (human) in blood. Also known as: the ratio of amount of bone marrow stromal antigen 2 (human) in blood to amount of neprilysin (human) in blood.