Description_x000D_ Amino Acid Sequence_x000D_ Asn-Arg-Val-Tyr-Val-His-Pro-Phe-Asn-Leu_x000D_ Application_x000D_ Angiotensins are peptide hormone components of the renin-angiotensin system involved in the regulation of blood vessel constriction and aldosterone release. Angiotensin I, a decapeptide derived from angiotensinogen, is a converted to Angiotensin II by the removal of the two C-terminal amino acids. Various analogues of Angiotensin I may be used as substrates to identify, differentiate and characterize angiotensin-converting enzyme(s) (ACE).