Figure 1

Dendrogram depicting phylogenetic relationships among T4-like phages based on gene content, i.e. gene presence/absence. T4 (accession NC_000866), RB49 (accession NC_005066), KVP40 (accession NC_005083), Syn9 (accession NC_005083), S-PM2 (accession NC_006820), P-SSM4 (accession NC006884), P-SSM2 (accession NC006883) S-RSM4 (accession FM207411). The dendogram was constructed from of a binary matrix of gene presence/absence from which Sorensen's distance was calculated.