Angiotensin I/II (1–6) (TFA)(Cat No.:I044309)is a synthetic hexapeptide representing the N-terminal sequence shared by both angiotensin I and II, key components of the renin-angiotensin system (RAS). This peptide fragment, typically Asp-Arg-Val-Tyr-Ile-His, plays a role in modulating vascular tone, blood pressure, and fluid balance. While less biologically active than the full-length hormones, it is used in research to study angiotensin processing, receptor binding, and enzyme-substrate interactions. The TFA (trifluoroacetate) form enhances solubility and storage stability. It is valuable in cardiovascular, renal, and metabolic disease studies exploring RAS-related pathways.