Asp-Arg-Val-Tyr-Val-His-Pro-Phe-His-Leu

5-L-Valine-angiotensin I, is an Ang 1 peptide used in renin-angiotensin system studies. Angiotensin I is a putative neurotransmitter. It is the precursor of angiotensin II and of angiotensin fragment 1-7, which are the hormones involved in regulation of fluid volume and the release of aldosterone.