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. 2017 Nov 6;7:14535. doi: 10.1038/s41598-017-14017-4

Figure 1.

Figure 1

Schematic representation of features of canonical G-quadruplex (G4) structures in DNA, along with a common sequence motif used to identify such structures. The structure comprises four tracts of guanines (G-tracts) that form planar G-tetrads through Hoogsteen base-pairing.