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Comparison of the amino acid sequences of the VEB-1, VEB-1a, VEB-1b, VEB-2, and VEB-3 beta-lactamases from P. aeruginosa JES from Thailand, P. aeruginosa KU-1 and KU-2 from Kuwait, P. aeruginosa 16 from Thailand, and E. cloacae 39 from China. Dashes indicate identical amino acids. The arrow indicates the position of the putative cleavage site of the leader peptide. Numbering is according to Ambler.
