Figure 3.

Antiparallel d[AGGGTTAGGG] hairpin slipped towards its 5′-terminus by one residue (this direction of slippage is marked as S5 in the text). (Top left) Atomistic structure: syn-oriented Gs are orange, anti-oriented Gs yellow, the first thymine in the loop is green and the backbone of other loop residues is tan. (Top right) Secondary structure scheme. Red and black colours correspond to anti and syn conformation, respectively. Grey residues are not depicted in the atomistic structure. The two GG base pairs are non-native tWH, the GT base pair is tWW. (Bottom) Comparison of GQ cWH and non-GQ tWH base pairs.