title: Letter: Improved measurement of plasma renin activity and concentration.
mesh_terms: D000804:Angiotensin II; D000818:Animals; D001665:Binding Sites; D002852:Chromatography, Ion Exchange; D005069:Evaluation Studies as Topic; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008722:Methods; D011485:Protein Binding; D011817:Rabbits / Q000276:immunology; D012083:Renin / Q000097:blood* / Q000276:immunology / Q000378:metabolism; D013045:Species Specificity; D013552:Swine; D013954:Thyroglobulin / Q000276:immunology
chemical_list: D000804:Angiotensin II; D013954:Thyroglobulin; D012083:Renin