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. 2012 Jun 14;7(6):e39017. doi: 10.1371/journal.pone.0039017

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Scanning electron micrographs of S. rotundus (A) and S. rugosus (B). (C) Transmission electron micrograph of S. rugosus. The bands are labeled as indicated. MOM stands for mycolate outer membrane and CM stands for cytoplasmic membrane.