Phylogenetic analysis inferred from the alignment of 175 amino acid positions predicted from benA sequences amplified from isolates (EBA05, EBA07, and EBA09; accession numbers EU677418, EU677419, and EU677420, respectively; in bold), as well as 19 reference sequences for benzoate 1,2-dioxygenase (BenA), toluate 1,2-dioxygenase (XylX), and chlorobenzoate dioxygenase (CbdA and CbeA) sequences from GenBank. The naphthalene dioxygenase, NahAc, from P. putida G7 is the outgroup. Accession numbers are given for the reference sequences.