A compound attribute that is the ratio of amount of synaptosomal-associated protein 23 (human) in blood to amount of synaptosomal-associated protein 29 (human) in blood. The trait is OBA_2055657 (SNAP23/SNAP29 protein level ratio in blood). Also known as: the ratio of amount of synaptosomal-associated protein 23 (human) in blood to amount of synaptosomal-associated protein 29 (human) in blood.