Inhibits the activity of the angiotensin-converting enzyme (ACE) by a preferential interaction with its C-domain. May also potentiate the hypotensive effects of bradykinin. Antagonizes the vasodilatory actions of bradykinin at the B2 bradykinin receptor. 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 central section; belongs to the bradykinin inhibitor peptide family. In the C-terminal section; belongs to the natriuretic peptide family.