A compound attribute that is the ratio of amount of proteinase-activated receptor 1 (human) in blood to amount of tumor necrosis factor receptor superfamily member 14 (human) in blood. The trait is F2R/TNFRSF14 protein level ratio in blood (OBA_2055336). Also known as: the ratio of amount of proteinase-activated receptor 1 (human) in blood to amount of tumor necrosis factor receptor superfamily member 14 (human) in blood.