Figure 3
From: Genome sequences of the Shiga-like toxin-producing Escherichia coli NCCP15655 and NCCP15656
Clustering analysis of the subunit A of the Shiga toxin type 1 and type 2. Un-rooted trees based on the nucleotide sequences of Shiga toxin subunit A were constructed using Neighbor-joining method with Jukes-Cantor model. Bootstrap values (percentages of 1,000 replications) greater than 50% are shown at each node. The scale bar represents 0.005 nucleotide substitutions per site. Yellow, E. coli B1 group; Sky blue, E. coli E group; Black, unknown (A) Shiga toxin type 1, (B) Shiga toxin type 2.