Figure 5From: Genetic diversity of the obligate intracellular bacterium Chlamydophila pneumoniae by genome-wide analysis of single nucleotide polymorphisms: evidence for highly clonal population structureMismatch distribution of cluster IV strains for the concatenated sequences (sSNPs). These curves represent the frequency distribution of pairwise differences. The dashed plot correspond to the observed data; the smoth curve corresponds to the sudden expansion model and the punctuated lines represent the upper and lower bounds of the 95% confidence interval on this model. P value represents the probability that the raggedness of the simulated data set is equal to or greater than the observed data set. The major demographic extension occurred 2 mutations ago for the entire concatenated genes (70 kb). The latter translates into 0.003% sequence divergence, which suggests that the maximum population expansion occurred about 3,300 years (700 to 7,200 years) ago.Back to article page