Phylogeny of zeta toxin (PezT) (A) and epsilon antitoxin (PezA) (B) protein sequences. Eighty-eight zeta toxin protein sequences (A) and seventy-two epsilon antitoxin protein sequences (B) from Streptococcus, Enterococcus, Oribacterium, Veillonella and Gardnerella bacterial species were aligned. The genetic relationships were determined as detailed in Figure 6.
Ma et al. BMC Genomics 2013 14:377 doi:10.1186/1471-2164-14-377