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. 2003 Sep;85(3):1787–1804. doi: 10.1016/S0006-3495(03)74608-6

FIGURE 1.

FIGURE 1

Schematic drawing of a guanine quadruplex stem formed by d(GGGG)4. This structure is stabilized by four stacked guanine quartet layers (left) and has all strands oriented in parallel (arrows) (right) with all anti glycosidic bonds.