Figure 2.

A schematic representation of the multiple alignments of the archaeal and eukaryotic species for the 34 universal ribosomal proteins. Purple marks segments alignable, and thus homologous, across both the eukaryal and archaeal phylogenetic domains; blue marks segments unique and alignable only among Eukarya; red marks segments alignable only among Archaea. Dotted lines represent sequence regions of varying length that are unalignable across the full sets of either Eukarya or Archaea. The representative species are listed in the legend of Figure 4. Ribosomal protein L7ae has been identified in some, but not all, major representative Bacteria, and is therefore neither universal nor eukaryotic-archaeal specific.