Endoparasitoid venom protein that interferes with the activation of host hemolymph prophenoloxidase. May act in conjunction with other venom proteins (such as Vn50), by competitive binding to the zymogen and thereby interrupting the enzyme. Expressed by the venom gland. Contains 2 disulfide bonds. Oxidized mass. Reduced mass. This species is an endoparasitoid, that contain symbiotic polydnaviruses (PDV) in its genome. PDVs, used to overcome the host defenses, are introduced into the body of the host larva at oviposition by the female wasp and have been shown to be essential for successful parasitism and development of the parasitoid inside the host. Interestingly, the coding region for Vn4.6 is located in the opposite direction upstream of a gene coding for a C.rubecula PDV structural protein (Crp32).