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Examples of base quartets that involve a G:G W:H Cis pair. The two guanine bases that form the W:H cis pair are labeled in blue. Interbase hydrogen bonds are shown in broken lines. Out of the seven base quartets shown, one belongs to cyclic topology (A), three belong to star topology (B–D), and three belong to linear topology (E–G). Details of the quartet topologies are described in http://quarna.iiit.ac.in/.
