A compound attribute that is the ratio of amount of cathepsin O (human) in blood to amount of cation-independent mannose-6-phosphate receptor (human) in blood. The trait is OBA_2054624 (CTSO/IGF2R protein level ratio in blood). Also known as: the ratio of amount of cathepsin O (human) in blood to amount of cation-independent mannose-6-phosphate receptor (human) in blood.