MEGF10/ROBO1 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2053798) can be described as follows. A compound attribute that is the ratio of amount of multiple epidermal growth factor-like domains protein 10 (human) in blood to amount of roundabout homolog 1 (human) in blood. Also known as: the ratio of amount of multiple epidermal growth factor-like domains protein 10 (human) in blood to amount of roundabout homolog 1 (human) in blood.