NFATC1/SPRY2 protein level ratio in blood (OBA_2055127, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of nuclear factor of activated T-cells, cytoplasmic 1 (human) in blood to amount of protein sprouty homolog 2 (human) in blood. Also known as: the ratio of amount of nuclear factor of activated T-cells, cytoplasmic 1 (human) in blood to amount of protein sprouty homolog 2 (human) in blood.