A compound attribute that is the ratio of amount of proteinase-activated receptor 1 (human) in blood to amount of thymosin beta-10 (human) in blood. The trait is F2R/TMSB10 protein level ratio in blood (OBA_2055335, an Ontology of Biological Attributes term). Also known as: the ratio of amount of proteinase-activated receptor 1 (human) in blood to amount of thymosin beta-10 (human) in blood.