Shows antimicrobial activity against the Gram-positive bacteria B.subtilis ATCC 6633 (MIC=2 ug/ml), and the Gram-negative bacteria E.coli JM109 (MIC=8 ug/ml). Expressed by the venom gland. This peptide is also found on female cuticle and nest paper. The venom could be the source of these peptides, which could be spread all over the cuticle by the frequent grooming movements of the female wasps. Belongs to the MCD family. Mastoparan subfamily.