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Comparison of active-site structures of polβ-BrG complexes. A, overlay of the gapped binary structure (gray) with the BrG·G ternary structure (green and blue). B, overlay of the gapped structure (gray) with the BrG·C ternary structure (yellow and red). C, overlay of the BrG·G ternary structure (green and blue) with the BrG·C ternary structure (yellow and red). D, overlay of the gapped binary, BrG·G ternary, and BrG·C ternary structures.
