Fig. 2From: Production of highly immunogenic and safe Triton X-100 produced bacterial ghost vaccine against Shigella flexneri 2b serotypeSEM image of Sf-BGCs/TW80. Scanning electron microscope (SEM) image of Sf-BGCs/TW80 pellet at magnification power × 16,000. White arrows point to a transmembrane tunnel formed in the cell walls of cells treated with (7%) v/v TW80 for 24 hBack to article page