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MLEE-based dendrogram for the ECOR reference collection of E. coli as derived by Herzer et al., using the NJ method to compare electrophoretic polymorphisms for 38 metabolic enzymes (23). Brackets at the right demarcate the five phylogenetic groups (A, B1, B, D, and nonaligned [non]). Heavy lines connect the 15 strains used in the present study (circles).
