Figure 2.

The mitochondrial (mt) genomes of Polyplax asiatica (A) and Polyplax spinulosa (B). Each minichromosome has a coding region (with gene name, transcription orientation and length indicated) and a non-coding region (in black). Minichromosomes are in alphabetical order by the names of their protein coding and rRNA genes. Abbreviations of gene names are: atp6 and atp8 (for ATP synthase subunits 6 and 8), cox1–3 (for cytochrome c oxidase subunits 1–3), cob (for cytochrome b), nad1–4 and nad4L (for NADH dehydrogenase subunits 1–6 and 4 L), rrnS and rrnL (for small and large subunits of ribosomal RNA). tRNA genes are shown with the single-letter abbreviations of their corresponding amino acids. Minichromosomes that have identical gene content and gene arrangement between the two Polyplax species are indicated with asterisk symbols “*”.