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Final 2Fo-Fc electron density map for 12 mismatches at the NBP of qm RB69pol contoured at 1.2 σ: (A) dTTP/dG; (B) dGTP/dT; (C) dCTP/dA; (D) dATP/dC; (E) dCTP/dT; (F) dTTP/dC; (G) dCTP/dC; (H) dTTP/dT; (I) dATP/dA; (J) dGTP/dA; (K) dATP/dG and (L) dGTP/dG.
