Structural protein that plays a role in the packaging of nucleocapsids and in their egress from the nucleus toward the cell periphery. Homodimer. Interacts with host nuclear F-actin. Capsid-associated. 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.