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. 2010 May 27;6(5):e1000922. doi: 10.1371/journal.ppat.1000922

Figure 1. Expansion of a set of IS elements in the B. mallei genome.

Figure 1

A. Average copy number of IS elements commonly present in B. mallei and B. pseudomallei. Three species of IS elements showed significant proliferation in B. mallei compared with their levels in B. pseudomallei. The number of representative IS elements, both as intact and degenerate (i.e., partly deleted) forms, are shown in graph. B. Distribution of the three types of IS element in the strains of B. mallei. The IS elements ISBma1, ISBma2, and IS407A can be divided into three groups depending on their distribution patterns in the B. mallei strains: 1) “Core” IS elements that are present in all the strains; 2) those IS elements present in more than two strains but not in all; and 3) those elements in only one strain. Groups 2 and 3 are collectively called “accessory IS elements” (for a scaled map with the IS insertion sites in all B. mallei and B. pseudomallei strains, see Fig. S1; for the patterns of genomic rearrangements in the strains of each species, see Fig. S2; for the actual comparative blast data, see Tables S1 and S2).