Western blot analysis of virus-like particles (VLPs). (A) Western blot analysis of SME-VLPs purified from culture supernatants of cells co-infected with rHBM-S, rHBM-M and rHBM-E. (B) Western blot analysis of SM-VLPs purified from culture supernatants of cells co-infected with rHBM-S and rHBM-M. (C) Western blot analysis of ME-VLPs purified from culture supernatants of cells co-infected with rHBM-M and rHBM-E. Lane M, protein molecular weight marker; Lane 1, purified VLPs containing S, M and E proteins; Lane 4, purified VLPs containing S and M proteins; Lane 5, purified VLPs containing M and E proteins; Lanes 2, 3 and 6, wild-type baculovirus.