title: Spectrophotometric and radiometric assays of angiotensin-converting enzyme compared.
mesh_terms: D002250:Carbon Radioisotopes; D006801:Humans; D007703:Peptidyl-Dipeptidase A / Q000097:blood*; D011874:Radiometry; D013053:Spectrophotometry
chemical_list: D002250:Carbon Radioisotopes; D007703:Peptidyl-Dipeptidase A