Fig. 1

Nine phage sequence types (PSTs) form three clusters when compared at the proteomic level. De novo gene prediction with prodigal was used to have consistent ORF prediction prior to tblastn analysis. Resulting LS-BSR values were clustered by average linkage hierarchical clustering resulting in three distinct main phage clusters (PST-1, PST-2, PST-3). Five proteins were highly conserved in PST2, 4 in PST3 and 6 in PST1, and almost 50 % of proteins are conserved in all phages. The LS-BSR for each ORF identifies unique (Blue = 0), divergent (Black = 0.5) and common proteins (Yellow = 1.0) [87]