Figure 7.

Schematic representation of catalytically important groups and their hydrogen-bonding network, as present in structure 3CG5¹⁴ of BlaC with a clavulanic acid cleavage product (indicated in blue) covalently bound to Ser-70. Distances (in Å) between heavy atoms involved in potential H-bonds are shown in red. Residues are numbered according to the Ambler consensus,¹¹ and other numbers represent the internal numbering of the published structure.