Fig. 2From: Occurrence and significance of pathogenicity and fitness islands in environmental vibriosMaximum-likelihood phylogeny (Kimura 2-parameter model) of doc toxin genes and phd antitoxin genes. Bold indicates sequences obtained from this study. The bootstrap values represent 1000 replications, and values of less than 50 are not shown. The reference sequences were acquired from NCBI GenBankBack to article page