Phenoloxidase cascade in insects with its possible inhibitory and stimulatory proteins of which homologues were found in N. vitripennis venom. Abbreviations: LPS = lipopolysacharide, βGRPs = β-1,3-glucan recognition proteins, PGRPs = peptidoglycan recognition proteins, CR/Pa = cystein-rich/Pacifastin venom protein, SPI = serine protease inhibitor, SP = serine protease, CR/Ku = cystein-rich/Kunitz venom protein, CR/TIL = cystein-rich/trypsin inhibitor-like venom protein, (pro)PAP = (pro)phenoloxidase-activating protease, (P)PO = (pro)phenoloxidase. Words in red indicate inhibitory proteins and the dotted lines indicate their targets in the pathway; underlined words indicate stimulatory proteins.