Variable genes in Aeromonas samples. Genes which were conserved (-1<Log Ratio <1) in all samples are removed. Red indicates genes with higher signal intensity for the tester than the control strain (higher copy number than strain A449). Green indicates genes with lower signal intensity for the tester than the control (divergent in sequence or missing or lower copy number). Gene order reflects results of hierarchical clustering of genes performed as described in Materials and Methods. The strains are ordered as in Figure 1, and unless otherwise noted, all other isolates are A. salmonicida subsp. salmonicida. aAsm – A. salmonicida subsp. masoucida, bAsa – A. salmonicida subsp. achromogenes, cAss – A. salmonicida subsp. salmonicida. (A) All genes which are divergent in at least one of the sixteen Aeromonas isolates. Blue bars indicate genes associated with the plasmid category and orange bars indicate genes associated with the transposon category as described in Material and Methods. (B) Subset of genes which are divergent (Log Ratio< -1) in the fourteen A. salmonicida strains and were not assigned to the plasmid or transposon functional categories. Genes predicted to code for OMPs (purple) and for flagella/pili proteins (grey) are indicated.