A compound attribute that is the ratio of amount of cytotoxic and regulatory T-cell molecule (human) in blood to amount of vascular cell adhesion protein 1 (human) in blood. The trait is OBA_2054463 (CRTAM/VCAM1 protein level ratio in blood). Also known as: the ratio of amount of cytotoxic and regulatory T-cell molecule (human) in blood to amount of vascular cell adhesion protein 1 (human) in blood.