Fig. 5

β-lactamase sequence alignments. a) Phylogenetic tree displaying relationships between β-lactamase (EC 3.5.2.6) encoded by A. faecalis PGB1 and other β-lactamases. Amino acid sequences are displayed above. b) Comparison of β-lactamase (EC 3.5.2.6) amino acid sequences encoded by A. faecalis with those conserved in class A, subclass A1b β-lactamases