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ChEBI: Angiotensin (1-9) is a nine amino acid peptide which is formed when angiotensin converting enzyme 2 (ACE2) hydrolyzes the carboxy terminal leucine from angiotensin I. It is a anti-cardiac hypertrophy agent. It has a role as a human metabolite, a rat metabolite, an antihypertensive agent and a cardioprotective agent. It is a tautomer of an angiotensin (1-9) dizwitterion.

angiotensin i/ii (1-9) is a peptide (asp-arg-val-tyr-ile-his-pro-phe-his) containing the amino acids 1-9 that are converted from angiotensin i/ii peptide.angiotensin i is formed by the action of renin on angiotensinogen, which has 12 amino acids and is an α-2-globulin produced constitutively and released into the circulation mainly by the liver. renin cleaves the peptide bond between the leucine (leu) and valine (val) residues on angiotensinogen, creating the ten-amino acid peptide angiotensin i. angiotensin i is converted to angiotensin ii (aii) through removal of two c-terminal residues by the enzymeangiotensin-converting enzyme (ace), primarily through ace within the lung.angiotensin is a peptide hormone that causes vasoconstriction and a subsequent increase in blood pressure. angiotensin also stimulates the release of aldosterone, which promotes sodium retention in the distal nephron so that drives blood pressure up.figure1 formula of angiotensin i/ii (1-9)

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