neaT is discordantly conserved.

(A) Left: Phyletic distribution of neaT homologues among genomes retrieved from NCBI (n = 317). Right: Number of gene sequences deposited in NCBI for each phylum as of November 2011. (B) Left: Pie graph showing distribution of neaT homologues among each phylum represented in the custom database (n = 21 non-paralogous neaT genes). Right: Theoretical distribution of neaT homologues within phyla present in the custom database based on random chance. P values for the observed versus theoretical phyletic abundance of neaT homologues were calculated by .score analysis. (C) Upper y-axis: bar graph depicts total number of non-paralogous homologues retrieved from the custom database (DB) for each gene encoded within φb0847 (plotted along the x-axis with respect to its position within the prophage genome). The neaT open reading frame is indicated in red. Lower y-axis: bar graph showing the percent of proteobacterial homologuesfound in the homologue set for each φb0847 gene. Sequences unique to CFT073 were assigned 100% proteobacterial conservation.