Fig. 4From: A comparative analysis of mitochondrial ORFs provides new insights on expansion of mitochondrial genome size in ArcidaeRates of synonymous and nonsynonymous substitutions within mitochondrial protein-coding genes and ORFs identified for Scapharca broughtonii ((3), (4), respectively). The details are recorded in Additional file 1: Table S10. Dark blue dots indicate mitochondrial protein-coding genes. Light green dots indicate the ORFsBack to article page