GZMA/GZMB protein level ratio in blood (OBA_2053115, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of granzyme A (human) in blood to amount of granzyme B (human) in blood. Also known as: the ratio of amount of granzyme A (human) in blood to amount of granzyme B (human) in blood.