A compound attribute that is the ratio of amount of long-chain fatty acid transport protein 4 (human) in blood to amount of tudor and KH domain-containing protein (human) in blood. The trait is SLC27A4/TDRKH protein level ratio in blood (OBA_2055653). Also known as: the ratio of amount of long-chain fatty acid transport protein 4 (human) in blood to amount of tudor and KH domain-containing protein (human) in blood.