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CLUSTAL W amino acid sequence alignments of the PBPs from S. marcescens (SfuASm), Y. enterocolitica (YfuAYe), Y. pestis (YfuAYp), N. meningitidis (FbpANm), and H. influenzae (HitAHi). Identical amino acids are shown in black boxes, while similar amino acids are shown in gray boxes. The consensus line (Con.) shows identical (capital letters) and similar (dots) amino acids. Locations of the yfuA primers from the Y. enterocolitica sequence used in reference 6 are shown by arrows.
