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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: APMIS. 2010 Jan;118(1):1–36. doi: 10.1111/j.1600-0463.2009.02563.x

Fig. 5.

Fig. 5

Structure of the active site of DD-carboxypeptidase and β-lactamase. A. The X-ray crystal structure of E. coli PBP5 (240) and Bacillus licheniformis BS3 beta-lactamase (241). The conserved SerXXLys, Ser[Tyr]XAsn, and Lys[His]Thr[Ser]Gly motifs (242) are colored in yellow, orange and green, respectively. The catalytic serine of the SerXXLys motif is colored in red.