Structural protein that plays a role in the first steps of per os larva infection. Present in both the budded virus (BV) and the occluded virus (OV). The occluded form allows the virus to be transmitted from insect to insect through ingestion of contaminated food while the budded form is responsible for the dissemination of infection throughout the insect host. Expressed late in infection. Belongs to the baculoviridae E56 family.