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Figure 7.
FIGURE 7. Comparative C and T base pairing orientations
opposite O^6-MeG at the catalytic center of the ternary
complexes. A, the 14th nucleotide C forms a wobble base pair
with template O^6-MeG in the O^6-MeG:C structure. B, the 14th
nucleotide T is positioned in three conformations opposite
O^6-MeG, owing to the disorder observed in the region near
thymidine in the O^6-MeG:T structure. The electron density map
(black mesh) 3F[o] - 2F[c] is contoured at the 1  level.
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