TABLE 1.

Nature and type of external polymeric surface structure for the Shewanella strains according to the study of Korenevsky et al. (9)^*

Designation	Bacterial strain	Characteristics of cell surface structures
CN32	S. putrefaciens	Devoid of any fibrous material and not capsulated†
BrYFC	S. algae	Heterogeneous populations of bacteria with and without capsular polysaccharides structures (from 60 to 90 nm)†
MR-4	S. oneidensis	Capsular polysaccharides structures (from 70 to 130 nm)†

^*In addition, they demonstrated on the basis of proteinase K/sodium dodecyl sulphate-polyacrylamide gel electrophoresis that all these strains presented rough LPS (with core oligosaccharide and no O-side chain).

^†From freeze-substitution electronic images (9).