This family contains viral proteins and includes Baculovirus Per os infectivity factor 3 (PIF3). PIF3 forms a complex on the occlusion-derived virus surface with PIF1, PIF2, and P74 which has an essential function in the initial stages of baculovirus oral infection [1].

1: Baculovirus per os infectivity factors form a complex on the surface of occlusion-derived virus. Peng K, van Oers MM, Hu Z, van Lent JW, Vlak JM; J Virol. 2010;84:9497-9504. PMID:20610731