Lys-[Des-Arg9]Bradykinin

This endogenous peptide is a potent and highly selective bradykinin B1 receptor agonist, exhibiting a Ki of 0.12 nM at the human B1 receptor versus >30,000 nM at B2. It acts as a hypotensive agent by reducing peripheral vascular resistance in vivo and is a valuable research tool for studying inflammation, pain, and cardiovascular pharmacology in both in vitro and in vivo models.