A compound attribute that is the ratio of amount of FXYD domain-containing ion transport regulator 5 (human) in blood to amount of protein sprouty homolog 2 (human) in blood. The trait is OBA_2053780 (FXYD5/SPRY2 protein level ratio in blood). Also known as: the ratio of amount of FXYD domain-containing ion transport regulator 5 (human) in blood to amount of protein sprouty homolog 2 (human) in blood.