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Structure of TT-DNA: superposition of the five last structures emergent from the restraint molecular dynamics viewed (a) from the side and (b) into the major groove. The mismatched thymine residues T6 and T17 are depicted in green, hydrogen atoms are not shown. (c) Close-up down view of the T6–T17 mismatch (O: red, N: blue, H: white, P: orange).
