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Figure 1.
Figure 1 Ribbon diagrams of the T/dATP (A), T/dGTP-1 (B) and
T/dGTP-2 (C) and T/G (D) structures around the active site. Dpo4
is shown as ribbons. The three conserved carboxylates in the
active site, the last two base pairs of the primer/template and
the replicating base pair are shown as ball-and-stick models.
The template strand is shown in blue and the primer strand in
purple. The incoming nucleotide is shown in different colors for
each crystal structure. The metal ions are shown as green
spheres. The 2F[o]-F[c] electron density maps are contoured at 1
 level
and superimposed onto the nucleic acid portion.
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