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REnin (kidney) interacts angiotensinogen and opens a binding site and undergoes a name change to angiotensin 1. Angiotensin 1 is now in circulaitn and finds its way to pulmonary vessels to find ACE (lung). ACE is angiontensin converting enzyme. ACE is a cleavage molecule that opens a binding site to angiotensin 2. ................
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