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The force-linking number density phase diagram of a 7.0-kbps DNA molecule. Gradual transitions occur between twisted (t), plectonemic (p), and melted (m) DNA. (Blue, green, and red) The fraction of basepairs in t, p, and m, respectively. The fraction of melted bps was multiplied by 10 in all regions to optimize the contrast. (White region) Three-state coexistence phase. To see this figure in color, go online.
