Co-localization of host aspartate aminotransferase (AST), GroEL, and viral VP371 in Geobacillus sp. E263. The host bacteria were challenged with GVE2. At different time post-infection, the GVE2-infected Geobacillus sp. E263 was labeled with the antibodies against the AST, GroEL, or VP371 (A). The GST (B) and the GST-MreB (C) were used as controls to detect the nonspecific co-localization with GroEL at 2 h post-infection. The bacteria were examined under a fluorescence microscope. The lane headings indicated the labeled proteins. The numbers showed the time post-infection in hours.