Figure 7
The structure of PBG bound to E. coli ALAD. The refined 2Fo − Fc electron density for the PBG and the active-site zinc ion (grey) is shown as blue lines contoured at 1.0 r.m.s.. The main interacting residues, including the Schiff-base lysines in the foreground, are labelled and hydrogen bonds are indicated by dotted lines. |