Bradykinin (1-6) is an amino-truncated Bradykinin peptide and a stable metabolite of Bradykinin, cleaved by carboxypeptidase Y (CPY). This fragment of Bradykinin activates pain receptors and induces smooth muscle contraction.
Bradykinin (1-5), a major stable metabolite of Bradykinin, is formed by the proteolytic action of angiotensin-converting enzyme (ACE). The bradykinin (BK) fragment (1-5) (RPPGF) is one of the most stable naturally occurring metabolites.
Potent and selective bradykinin B1 receptor agonist (EC50 = 9.02 nM in rabbit aorta) that is resistant to aminopeptidase, kininase I and II (ACE) and neutral endopeptidase cleavage. Exhibits hypotensive and angiogenic activity in vivo.
Endogenous potent and highly selective bradykinin B1 receptor agonist (Ki values are 0.12 and > 30000 nM at human B1 and B2 receptors respectively). Hypotensive agent that reduces peripheral vascular resistance in vivo. 16-fold more potent than [Des-Arg9]