HNMT/SETMAR protein level ratio in blood (OBA_2053063, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of histamine N-methyltransferase (human) in blood to amount of histone-lysine N-methyltransferase SETMAR (human) in blood. Also known as: the ratio of amount of histamine N-methyltransferase (human) in blood to amount of histone-lysine N-methyltransferase SETMAR (human) in blood.