blood enzyme activity level blood angiotensin I converting enzyme 2 activity level 2017-07-19T16:22:38Z CMO:0002742 Quantitation of the catalytic effect exerted by angiotensin converting enzyme2 (ACE2) in a specified sample of blood. ACE2, an ACE homolog, is a zinc-dependent peptidase of the M2-metalloprotease family that is sensitive to chloride ion concentration, and is a membrane-bound enzyme that acts as a monocarboxypeptidase and is an essential regulator of heart function. blood ACE2 activity level clinical_measurement_ontology jesmith