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Visualization of the structure of filamentous actin (red) in human airway epithelia. Confocal x-y scans from the apical epithelial domain from control airway epithelia (A), cytochalasin D-treated airway epithelia (B), and B. multivorans-infected airway epithelia (C). Note that colocalization of green bacteria within red epithelial cells is seen as yellow-stained areas. Bar, 10 μm.
