Ontology of Biological Attributes id OBA_2053124 (GZMH/KLRD1 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of granzyme H (human) in blood to amount of natural killer cells antigen CD94 (human) in blood. Also known as: the ratio of amount of granzyme H (human) in blood to amount of natural killer cells antigen CD94 (human) in blood.