Cover photograph (Copyright © 2007, American Society for Microbiology. All Rights Reserved.): Shigella flexneri forms intracytoplasmic actin tails within human epithelial (HeLa) cells 5 h after invasion. The cellular F actin was visualized with Alexa-488 phalloidin (green), the bacterial envelopes were detected with an anti-Shigella lipopolysaccharide antibody (red), and the nuclei were stained with Hoechst (blue). Three-dimensional reconstruction of a confocal Z-stack. (Photo courtesy of Volker Brinkmann, Max Planck Institute for Infection Biology, Berlin, Germany.)
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