Figure 6

Phylogram of 39 selected bacteria and 83 selected bacteriophages for which genomic sequences are available. The organisms were grouped by using distance matrices based on the sums of the differences from the other organisms for the 256 tetranucleotide combinations, as described in Materials and Methods. Phylogenies were created by neighbor-joining analysis. Colors indicate bacteriophages (red), bacteria (green), and bacteriophages that are substantially beyond their presumed distribution (blue). Bootstrap values >50 based on 100 replicates are represented at each node, and branch length index is indicated below the phylogeny. Phages isolated in gram-positive bacilli, gram-positive cocci, gram-negative enterobacteria, and gram-negative non-enterobacteria are indicated by the brackets.