Bradykinin-potentiating peptide both inhibits the activity of the angiotensin-converting enzyme (ACE) and enhances the action of bradykinin by inhibiting the peptidases that inactivate it. It acts as an indirect hypotensive agent (By similarity). Bradykinin inhibitor peptide antagonizes the vasodilatory actions of bradykinin at the B2 bradykinin receptor (By similarity). Has no demonstrable hypotensive activity when injected intravenously in rats. Snake venom natriuretic peptide that exhibits hypotensive and vasodepressor activity. Acts by activating natriuretic receptors (NPR1 and/or NPR2 and/or NPR3) (By similarity). Venom gland. In the N-terminal section; belongs to the bradykinin-potentiating peptide family. In the C-terminal section; belongs to the natriuretic peptide family.