Angiotensin I/II (1-6) TFA contains the amino acids 1-6 and is converted from Angiotensin I/II peptide. The precursor angiotensinogen is cleaved by renin to form angiotensin I. Angiotensin I ishydrolyzed by angiotensin-converting enzyme (ACE) to form the biologically active angiotensin II. Angiotensin II has been investigated for the treatment, basic science, and diagnostic of Hypertension, Renin Angiotensin System, and Idiopathic Membranous Nephropathy.