Measures of the composition of the Ac genome based on sequence similarity. For each protein, the best BLASTP hit to the non-redundant database, that is, the match with the lowest e-value, was recovered and the classification of the corresponding organism was extracted according to NCBI taxonomy. The central bar represents the full complement of annotated Ac genes exhibiting a best BLASTP hit respectively against the four kingdoms - Eukaryota (blue), Bacteria (red), Archaea (green) and viruses (purple) - with orphan genes depicted in yellow. Results for Eukaryota are subdivided according to the major taxonomic phyla in varying shades of blue. Subdivisions of phyla within the Bacteria (red shading), Archaea (green shading) and viruses (purple shading) are depicted in the expanded upper and lower sidebars. dsDNA, double-stranded DNA.