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Electron microscopy of Marinobacter strain 2Asq64. (A) Strain negatively stained with uranyl acetic acid or (B, C, and D) with phosphotungstic acid; (A and B) strain grown on medium containing yeast extract and bactopeptone as carbon sources (5 g liter−1); (C) strain grown on squalene as carbon source; (D) strain grown in N-limited conditions in the presence of squalene.
