Figure 1.
Mitochondrial chromosome architecture in D. papillatum. (A) The constant region is identical within Classes A and B chromosomes. The portion shared by Classes A- and B chromosomes is indicated in dark grey. The cassette includes the coding region (gene module) and two unique module-flanking regions. (B) repeat structure of two representative chromosomes, A3207 (Class A) and B3209 (Class B). Triangles denoted a–h symbolize distinct repeat motifs that are all arranged in the same orientation. The replication origin inferred from the GC skew is indicated by a hollow arrow. For GenBank accession numbers, see Table 1.