Fig. 4From: Construction of Lactobacillus casei ghosts by Holin-mediated inactivation and the potential as a safe and effective vehicle for the delivery of DNA vaccinesLocalization of loaded DNA in L. Casei ghosts visualized by confocal laser scanning microscopy. a L. casei 393 ghosts filled with SYBR Green I labeled pCI-EGFP under white light. b L. casei ghosts filled with SYBR Green I labeled pCI-EGFP. Overlay of differential interference contrast and fluorescent image. The image indicated that the plasmid was filled within the bacterial ghosts. c Ghost membranes were stained with MitoTracker Green FM (green). d pCI-EGFP was detected by in situ hybridization with Cy3-labeled probes (red) specific for the EGFP. e All fluorescence photomicrographs (c, d) were taken of one middle z-scan section through the middle plane of the loaded bacterial ghosts and subsequently overlaid (e). Direct overlays of red and green fluorescent structures are represented by the yellow colorBack to article page