Fig. 6From: Massive horizontal gene transfer, strictly vertical inheritance and ancient duplications differentially shape the evolution of Bacillus cereus enterotoxin operons hbl, cytK and nhe Nhe in B. cereus sensu lato. Phylogenetic nheABC tree (Maximum Likelihood Method) based on the concatenated sequences from 142 B. cereus sensu lato strains. Inset: Phylogenetic tree based on the concatenated sequences of nheABC and nheABC a from 142 B. cereus sensu lato strains, indicating an ancient origin of nheABC a Back to article page