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Phylogenetic tree based on representative toxins of putative Type III TA systems associated with the consensus repeats of the antitoxins: adenine (grey), guanine (white), cytosine (yellow), and uracil (orange). Toxin protein sequences were aligned using MUSCLE [48]. The tree has been constructed using PhyML and nearest neighbour interchange [49,50] and the figure has been made using Ete3 [51].
