Causes constriction of the isolated rat ileum muscles (is 13-fold less potent than bradykinin (BK)), as well as degranulation of mast cells (is 7-fold more potent than BK). In vivo, causes algesic effects. Muscle constriction and algesic effects are partially mediated by bradykinin receptors B2 (BDKRB2). Expressed by the venom gland. Dose that causes constriction of the isolated rat ileum muscles (ED(50)) is 3.8 uM. Dose that causes degranulation of mast cells (ED(50)) is 100 uM. Belongs to the bradykinin-related peptide family.