Figure 1.

Synechococcus (strain WH8113) Cross fracture revealing concentric layers of cell envelope. The inset corresponds to the outlined section of cell envelope comprising cell membrane (CM), peptidoglycan layer (P), outer membrane (OM), and surface layer (S). A thylakoid layer (T) is also indicated. Scale bar, 200 nm.

Samuel et al. BMC Microbiology 2001 1:4   doi:10.1186/1471-2180-1-4
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