General features of CGR groups and putative host assignment.

CGR (Complete Genome Representative): contig representing a complete phage genome of a cluster of highly related contigs (>95% identity and 20% coverage in nucleotide sequence). The putative host taxon assigned to one or more CGRs in a group is shown. The last column shows the evidence for host assignment in brackets next to the host name. SS: putative host inferred by the high sequence similarity to known phages; AMG: Auxiliary metabolic gene; INT: putative host inferred by an exact match of a putative phage site-specific attachment site (attP) in an integrase carrying CGR to a host tRNA (host site-specific attachment site attB). The asterisk (*) in G13 indicates that host prediction was performed using a GF (genome fragment of an incomplete phage genome) and not a CGR.