Figure 4

The dendrogram generated by CGH analysis of E. coli O157:H7 strains. Data generated from two arrays for each strain have been averaged and analyzed with acuity 3.1. The 6057 locus tags of open reading frames of three E. coli strains (EDL933, Sakai, and K12 MG1655) in the image were organized alphabetically. The dendrogram was generated by hierarchical cluster analysis (Pearson correlation) of log2 (RAT2N) of each strain with Acuity 3.1. In the colour scheme at the bottom of above figure, the brightest green corresponds to spots that are absent (divergent) with high certainty, the brightest red indicates spots that are present (conserved) with the greatest certainty, the black indicates spots that are uncertain or slightly divergent.