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Immunofluorescent confocal images of Oct4 and vimentin in bronchus. (A) Oct4-positive cells are localized in a bronchus between the bronchiolar epithelium and smooth muscle cells layer. (B) Immunolabeling for vimentin. (C) The merged picture shows co-localization of Oct4 and vimentin. Note that Oct4-positive cells extend to the alveolar septum (arrow); bar = 10 μm.
