A-779 Peptide is a selective angiotensin-(1-7) antagonist. This peptide is contained within Angiotensinogen which after processing regulates both the volume and the mineral balance in the body. A-779 peptide binds to Mas receptor with an IC50 of 0.3 nM.H-Asp-Arg-Val-Tyr-Ile-His-D-Ala-OH or H-DRVYIHa-OH