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Electron micrographs of sphingomonads. (A) Strain A1 cell grown in the absence of alginate. (B) Strain A1 cell grown on alginate. (C) p6 gene-disruptant cell grown on alginate. (D) Sphingomonas mali cell. (E) Sphingomonas paucimobilis cell. (F) Sphingomonas parapaucimobilis cell.
