Files in this Data Supplement:

• Supplemental file 1 - Further details on genome structure and restriction-modification systems; two large identical transposons from the Sulfurimonas denitrificans genome (Fig. S1); map of a region from the Sulfurimonas denitrificans genome that includes a small repeated region (Fig. S2).
  MS Word document, 305K.
• Supplemental file 2 - Phylogenetic relationships of NosZ from different bacteria and the archaeon Pyrobaculum calidifontis (Fig. S3).
  Zipped TIF document, 95K.