A compound attribute that is the ratio of amount of junctional adhesion molecule B (human) in blood to amount of repulsive guidance molecule B (human) in blood. The trait is Ontology of Biological Attributes term OBA_2055491 (JAM2/RGMB protein level ratio in blood). Also known as: the ratio of amount of junctional adhesion molecule B (human) in blood to amount of repulsive guidance molecule B (human) in blood.