A compound attribute that is the ratio of amount of NT-3 growth factor receptor (human) in blood to amount of scavenger receptor class F member 2 (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2055209 (NTRK3/SCARF2 protein level ratio in blood). Also known as: the ratio of amount of NT-3 growth factor receptor (human) in blood to amount of scavenger receptor class F member 2 (human) in blood.