Fig. 3

Mean (a) and Median (b) ORFans’ length vs. average HHP length for selected eight groups of prokaryotes. Each point represents a genome. Family Mycoplasmataceae (pink), family Mycobacteriaceae (red), genus Agrobacterium (blue), genus Bacillus (green), genus Anaplasma (orange), genus Ehrlichia (dark green), genus Neorickettsia (black) and genus Campylobacter (grey) are shown. The regression line shows the relationships between the mean HHP length and the mean ORFan length across 1484 annotated prokaryotic genomes