Description_x000D_ Amino Acid Sequence_x000D_ Ile-Ser-Arg-Pro-Pro-Gly-Phe-Ser-Pro-Phe-Arg_x000D_ Application_x000D_ Bradykinin, a nonapeptide, is a potent endothelium-dependent vasodilator that operates via bradykinin receptors B1 and B2. Bradykinin Ile-Ser (T-Kinin) has a biological profile similar but not identical to bradykinin which is more resistant to degradation by kininase angiotensin converting enzyme (ACE). Bradykinin Ile-Ser is used to differentiate bradykinin receptor specificity and function.