FIG 2 .

Thick enveloping mats of extracellular matrix (sweater structure) make up a large fraction of the E. faecalis biofilm (A, secondary electron image) and contain significant eDNA, as shown via immunogold labeling of the anti-dsDNA monoclonal antibody (B, backscatter image of the same field). Bars, 1 µm. (C) False-color SEM image showing the relationship between the surface of the ECM (red; secondary electron detector) and the immunogold-labeled anti-dsDNA antibody (green; backscatter detector). eDNA appears to be encased within another ECM component (arrows). Bar, 500 nm.