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Evolutionary relationship of Erwinia amylovora and related Erwinia species. Phylogenetic tree was constructed from concatenated sequences (2222 aa) of four housekeeping proteins (AcnB, GltA, GyrB and RpoD) using Neighbor-Joining (NJ) method. Bootstrap scores greater than 60 are given at each node. The scale bar represents 0.005 amino acids substitutions per site. E. billingiae strain Eb661 was used as an outgroup.
