Fig. 4

Conservative stretches of CRs in 11 Culex and Lutzia mt genomes with complete CR sequences. The ellipses filled with different colors indicate regions with different tandem repeat units (repeat number and unit bp length showing beneath the corresponding ellipses), the pentagrams denote regions with 17–20 repeats of nucleotide T, and the green-filled boxes demonstrate the non-repeat regions with the sequence length marked inside