A neighbor-joining tree analysis of the Bacillus terminase mirrors whole genome cluster assignments. Phage names are colored by whole genome subcluster assignment, and this subcluster assignment is indicated on the right. Putative replication strategies for phages are also indicated when known. Abbreviations are direct, terminal repeats (DTR) and cohesive ends (cos). The phylogenetic tree was constructed using a MUSCLE  alignment and the neighbor-joining method in Mega5 . Bootstrapping was set to 2000 and the unrooted tree was collapsed at a less than 50% bootstrap value.