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(a, c, d) Height and (b) deflection images in air of peptidoglycan sacculi from L. lactis VES5748, gently broken by a french press. Images a and b show the outside surface of the same sacculus consisting of a double cell wall. Image c represents another sacculus in which the boarder exposes the inner surface of a single wall (arrow). (d) High-resolution view of the outer surface, similar morphology being observed on the inner surface.
