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Fig. 3 | BMC Evolutionary Biology

Fig. 3

From: Variability of mitochondrial ORFans hints at possible differences in the system of doubly uniparental inheritance of mitochondria among families of freshwater mussels (Bivalvia: Unionida)

Fig. 3

Schematic organization of the atp6-nad4L and nad2-trnE regions of the freshwater mussel (Unionida) based on mt genomes presented in this study and of already published ones. Sample size for each family: 2 Iridinidae (all non-DUI), 5 Mulleriidae (all non-DUI), 7 Hyriidae (2 F, 2 M, 3 non-DUI), 10 Margaritiferidae (6 F, 3 M, 1 H), 38 Unionidae (17 F, 17 M, 4 H). GenBank accession numbers of the mt genomes used are enlisted in Table 1 and Additional file 1: Table S1. Standard mitochondrial genes are in grey, while ORFan genes (see the main text for a complete description of these genes) are colored following this code: green, Anodontites trapesialis specific ORFans; blue, M-orfs; pink, F-orfs; light pink, H-orfs. Genes are pointed according to their relative direction on the mtDNAs. tRNA genes are indicated with the one-letter code of their respective amino acid. Dotted lines represent the segments between the two regions, which are not indicated for simplicity. Sinanodonta woodiana annotation is based on [12] and on the current study

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