Figure 5.

Linear alignment of mt gene order of Physella acuta compared with other panpulmonate gastropods. Phylogenetic relationships shown are based on analysis of 18S, 28S, 16S and COI sequences (Jörger et al., 2010). Protein-encoding and rRNA genes are colour coded to emphasize patterns and gene rearrangements. Single letters designate tRNA genes. The genes encoded on the negative strand (underlined) are the same for all species shown. Bold lines under the alignment delineate clusters of genes with the same internal order for the majority of the panpulmonates. Note that gene rearrangements among the panpulmonates are modest and rarely affect protein-encoding gene orders, with the exception of P. acuta. Alignment is not to scale.