FIG. 3.
Distribution of tandem repeats in intergenic regions. (a) Distribution of the periods of the tandem repeats found in expanding/contracting intergenic regions between E. ruminantium strains Gardel (Erga) and Welgevonden (Erwe). The distribution is clearly bimodal, with one population of short-period tandem repeats (∼12 bp) and a second population of long-period tandem repeats (∼150 bp). (b) Correlation between the observed differences in intergenic size (Δobs) and the values calculated by assuming that the differences are due solely to the different numbers of tandem repeat copies (Δtheo).