FIG. 7.

Graded relatedness that defines the Wβ-and-γ group of phages. The flow chart is based on genetic differences described in this work and is intended only to illustrate the mutations and recombination events that currently distinguish each phage. Other than those differences reported here, all phage sequences are identical. The series of alterations is presented in an arbitrary manner and is not intended to imply any true phylogeny. The γ variants listed are γ^d'H (isolate d'Herelle described in this study), γ^U (isolate USAMRIID), γ^L (isolate LSU), and γ^C (Cherry isolate). aa, amino acids.