Venom dipeptidyl-peptidase which removes N-terminal dipeptides sequentially from polypeptides having unsubstituted N-termini provided that the penultimate residue is proline. May process venom proteins into their active forms and/or modulate the chemotactic activity of immune cells after the insect sting. Release of an N-terminal dipeptide, Xaa-Yaa-|-Zaa-, from a polypeptide, preferentially when Yaa is Pro, provided Zaa is neither Pro nor hydroxyproline. Inhibited by diprotin A. Expressed by the venom gland. Causes an allergic reaction in human. Belongs to the peptidase S9B family. DPPIV subfamily.