Figure 1.

Schematic representations of the major types of previously reported G4 oligomers and fragments of multimers. (A) Head-to-head stacks; (B) head-to-tail stacks; (C) tail-to-tail stacks; (D) head-to-head interlocked G4s; (E) fragments of classical G-wires; (F) fragments of ‘lego’ wires; (G) head-to-head interlocked G4s with mixed tetrads and hexads; (H) stacks of interlocked G4s with mixed tetrads. The bottom panel contains top views of the G-tetrad, mixed tetrads and the hexad, colored accordingly in the top panel.