Vespakinin-M, a novel bradykinin analogue containing hydroxyproline, in the venom of Vespa mandarinia smith.

Abstract
A new hornet-kinin, Vespakinin-M, which contains a hydroxyprolyl residue in its sequence, was isolated from the venom of V. mandarinia. The amount of the peptide in 1 venom sac was approximately 15 nmol, which was much higher than the concentration in other wasp venom.