A compound attribute that is the ratio of amount of FXYD domain-containing ion transport regulator 5 (human) in blood to amount of YTH domain-containing family protein 3 (human) in blood. The trait is FXYD5/YTHDF3 protein level ratio in blood (OBA_2053784, an Ontology of Biological Attributes entry). Also known as: the ratio of amount of FXYD domain-containing ion transport regulator 5 (human) in blood to amount of YTH domain-containing family protein 3 (human) in blood.