A compound attribute that is the ratio of amount of protein AMBP (human) in blood to amount of retinoic acid receptor responder protein 2 (human) in blood. The trait is Ontology of Biological Attributes term OBA_2054263 (AMBP/RARRES2 protein level ratio in blood). Also known as: the ratio of amount of protein AMBP (human) in blood to amount of retinoic acid receptor responder protein 2 (human) in blood.