Complete mitochondrial genomes of two marine monogonont rotifer strains.

The complete mitochondrial genomes of German strain were 10,721 bp (mitochondrial DNA I) and 12,274 bp (mitochondrial DNA II) in size, while the complete mitochondrial genomes of Australian strain were 10,889 bp (mitochondrial DNA I) and 12,443 bp (mitochondrial DNA II) in size. Of 12 protein-coding genes (PCGs), 99.6% of amino acid sequences were identical between the two strains. Of 12 PCGs of both strains, three genes (, , and ) had incomplete stop codon T. Furthermore, ATA was the start codon for , , and genes, whereas that for other PCGs was ATG in both strains. The base compositions of 12 PCGs in the strains were similar, indicating that the mitochondrial genome of the two strains was structurally conserved over evolution. The gene structure and its orientation of 12 PGCs of strains were identical, as shown in other marine rotifers and the freshwater rotifers, while the freshwater rotifer had an additional cytochrome b gene in the mitochondrial DNA I.