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Figure 4.
Figure 4. A Tunnel into the Polymerase Active SiteThe
molecular surface of RB69 pol in its polymerizing mode is
colored by domain according to the scheme of Figure 1A. The dTTP
and associated metal ions are at the center of the image, with
the primer-template DNA, shown semitransparently behind the
surface, extending off to the left. The terminal amine of Lys
560 protrudes into the tunnel, as indicated. This view is
roughly the same as that of Figure 2 and Figure 3
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