the biological significance of active and inactive renin was investigated by comparison of an in-vitro assay of active , total and inactive plasma renin concentration ( prc ) , plasma renin activity ( pra ) and plasma concentrations of angiotensin i and ii with an in-vivo change in mean arterial blood pressure ( map ) produced by antagonism of angiotensin with treatment with saralasin and by blockade of angiotensin-converting enzyme by treatment with captopril .
C0003006
angiotensin i
C0003018
angiotensin