Phylogenetical tree of the different fish species under analysis built using the taxonomical information available at the NCBI database. Origin of fish pictures: the images have been downloaded from freely available web resources and extensively readapted. The black arrow represent the whole genome duplication (WGD) event, involving also the DG gene, that took place during the Actinopterygii speciation. The two additional arrows (green and red) mark hypothetical timings of the mini-intron gaining event.
Pavoni et al. BMC Molecular Biology 2007 8:34 doi:10.1186/1471-2199-8-34