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. 2003 Dec;85(6):4076–4092. doi: 10.1016/S0006-3495(03)74820-6

FIGURE 6.

FIGURE 6

Transmission electron micrographs of the Lactobacillus strains harvested in late-stationary phase. (a) L. johnsonii DSM20533; (b) L. johnsonii ATCC33200; and (c) L. crispatus DSM20584. In all three images, a dark band can be observed ∼20–40 nm below the surface (white arrows). The dark staining hints at a high protein content. Only in the case of L. crispatus DSM20584 (c), a thin dark band can be seen at the outer surface (black arrow and insert). It is inferred that this protein-rich layer largely determines the surface properties of the strain. Bar = 250 nm. Magnification of the insert is 2.2× the magnification of the main image.