Figure 1 - full size

Figure 1.
FIG. 1. A, chemical structures of G-AF and G-AAF. dR, deoxyribose ring. The proton and the N-acetyl group that differentiate G-AF from G-AAF are shown in orange. B, schematic of the polymerase active site. Sites through which the template base (red) traverses during replication are shown (see the Introduction for description).