Figure 2

Estimates of the GC content and genome size of the 132 hexapod mitochondrial genomes. (A) The ranges of the GC content in the nearly completely and the completely sequenced mitochondrial genomes are shown. The closed red circle indicates the average GC content, and the blue and red bars present the maximum and minimum GC contents, respectively. (B) The distribution of mitochondrial genome sizes in different hexapod orders is shown. The closed red circle indicates the average mitochondrial genome size and the blue and red bars present the largest and smallest genome sizes, respectively (see also Table 2 and Table 3).